In the vast world of the English language, adjectives play a crucial role in adding depth and detail to our descriptions. These essential words help us convey the characteristics of people, places, and things more precisely. Among the thousands of adjectives that exist, some are quite lengthy and unique, often leaving a lasting impression on the reader.
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In this resource, we will explore a fascinating list of adjectives that contain 17 letters, showcasing the beauty and complexity of the language.
Word Meanings
Aerothermodynamic: Relating to the combined study of aerodynamics and thermodynamics, particularly in the context of high-speed flight or propulsion.
Annihilationistic: Pertaining to the concept or doctrine of complete destruction or annihilation.
Antiagglutination: Preventing or inhibiting the clumping together of particles, such as blood cells.
Antiagglutinative: Counteracting the process of agglutination, where particles clump together.
Anticommunistical: Opposed to or critical of communism, a political and economic ideology.
Anticonfederative: Opposing or working against confederation, the joining of states or groups for a common purpose.
Antiferromagnetic: Exhibiting a type of magnetic ordering where neighboring magnetic moments align in opposite directions.
Antigravitational: Counteracting or opposing the force of gravity.
Antimaterialistic: Rejecting or opposing materialism, the belief that material possessions and physical comfort are of primary importance.
Antimechanization: Opposed to the process of mechanization, which involves the introduction of machinery into various sectors of society.
Antimodernization: Opposing or resisting the adoption of modern practices, technologies, or ideas.
Antinationalistic: Opposed to or critical of extreme nationalism or excessive patriotism.
Antiparliamentary: Against or opposed to parliamentary systems of government or their principles.
Antiphilosophical: Counteracting or rejecting philosophical thought, principles, or inquiries.
Antirationalistic: Opposed to or critical of rationalism, the belief in the importance of reason and logical thinking.
Antixerophthalmic: Counteracting or treating xerophthalmia, a medical condition characterized by dryness of the eyes.
Aristolochiaceous: Belonging to the Aristolochiaceae family of plants, which includes the birthwort family.
Arytenoepiglottic: Pertaining to the arytenoid cartilages and the epiglottis in the human throat.
Astrophotographic: Relating to the use of photography in capturing images of celestial objects and phenomena.
Bibliotherapeutic: Concerned with the use of literature and books as a form of therapy or healing.
Bioclimatological: Involving the study of the relationship between climate and living organisms.
Bioelectrogenetic: Pertaining to the genetic factors influencing the production of electricity in living organisms.
Chronogrammatical: Pertaining to chronograms, sentences or inscriptions in which certain letters or words represent numerals.
Circumlocutionary: Involving or characterized by the use of excessive or roundabout language to express a simple idea.
Contradistinctive: Marked by a distinct or contrasting difference.
Contrasuggestible: Not easily influenced or affected by suggestion.
Counterattractive: Exerting a force or influence opposite to attraction.
Counterproductive: Tending to hinder or oppose one’s goals or intended outcomes.
Crossfertilizable: Capable of being cross-fertilized, as in the process of pollination between different plant varieties.
Cryptocrystalline: Having an extremely fine crystalline structure that is not easily visible to the naked eye.
Cryptogrammatical: Involving the use of cryptograms or secret codes in language.
Cytoarchitectural: Concerned with the architectural organization of cells, especially in relation to brain structure.
Cytotrophoblastic: Relating to the trophoblast, the outer layer of cells surrounding an embryo in the early stages of development.
Deanthropomorphic: Removing or eliminating human characteristics, traits, or attributes from something.
Dipterocarpaceous: Belonging to the Dipterocarpaceae family of flowering plants, known for their valuable timber and resin.
Disproportionable: Not capable of being proportioned or scaled properly.
Electroanalytical: Involving the use of electrical methods for analyzing chemical substances.
Electrobiological: Relating to the interaction between electricity and living organisms.
Electrodiagnostic: Pertaining to the use of electrical methods for diagnosing medical conditions.
Electromechanical: Involving the interaction between electricity and mechanical systems or processes.
Electromyographic: Concerned with the measurement and recording of electrical activity in muscles.
Encephalomyelitic: Relating to inflammation of both the brain and the spinal cord.
Epitheliomuscular: Combining epithelial and muscular characteristics, often in reference to tissue types.
Experientialistic: Characterized by a philosophy or perspective that emphasizes direct experience as a basis for understanding.
Extraprofessional: Outside the realm of one’s profession or occupation.
Gastroenterologic: Pertaining to the study or treatment of the stomach and intestines.
Haemagglutinative: Causing the clumping together of blood cells, typically through the action of antibodies.
Histopathological: Concerned with the study of the structural changes in tissues caused by disease.
Historiographical: Relating to the methods, principles, and writing of history.
Hydrocarbonaceous: Containing or consisting of hydrocarbons, organic compounds made of hydrogen and carbon atoms.
Hyperenthusiastic: Extremely enthusiastic or passionate.
Hyperintellectual: Excessively concerned with intellectual pursuits or abstract thinking.
Hyperleucocytotic: Characterized by an abnormally high number of white blood cells in the blood.
Hypermetaphorical: Extremely metaphorical or symbolic.
Hypermetaphysical: Going beyond or transcending traditional metaphysical concepts or interpretations.
Hyperpolysyllabic: Containing an unusually large number of syllables.
Indistinguishable: Impossible to differentiate or perceive as different.
Intellectualistic: Characterized by an emphasis on intellectual pursuits, often to the exclusion of emotional or practical considerations.
Intercommunicable: Capable of being communicated or shared between different individuals or groups.
Interconfessional: Involving or relating to different religious confessions or denominations.
Interdepartmental: Relating to or involving different departments within an organization or institution.
Interdisciplinary: Involving multiple academic or professional disciplines.
Intergovernmental: Concerning relations or activities between different governments.
Interprofessional: Involving cooperation or collaboration between different professional disciplines.
Interproglottidal: Occurring between adjacent proglottids, segments of a tapeworm.
Interproportional: Exhibiting a proportional relationship between different elements or aspects.
Interprotoplasmic: Occurring between different protoplasmic regions or cells.
Intersystematical: Involving or relating to different systems or systematic arrangements.
Kinematographical: Pertaining to the study or production of moving images or cinema.
Laryngopharyngeal: Concerning the larynx and pharynx, particularly their anatomical and functional aspects.
Lexicostatistical: Involving the statistical analysis of the vocabulary of languages to determine their historical relationships.
Medicochirurgical: Relating to both medicine and surgery.
Metapsychological: Pertaining to or beyond the scope of traditional psychology.
Meteoropathologic: Concerning the study of the relationship between meteorological conditions and health.
Microclimatologic: Pertaining to the study of microclimates, small-scale variations in climate conditions.
Microphotographic: Involving or relating to extremely small-scale photography.
Misrepresentative: Conveying a false or misleading impression of something.
Multidenticulated: Having multiple small teeth or projections.
Multidisciplinary: Involving the contributions of various academic or professional disciplines.
Nonadministrative: Not related to administrative duties or responsibilities.
Nonaristocratical: Not characteristic of or associated with aristocracy or the upper class.
Noncharacteristic: Lacking typical or distinctive features.
Noncircumstantial: Not dependent on specific circumstances or conditions.
Noncircumvallated: Not surrounded or enclosed by a circumvallate structure or formation.
Noncollectivistic: Not adhering to or advocating for collectivism, the prioritization of collective interests over individual interests.
Noncomprehendible: Not capable of being comprehended or understood.
Noncomprehensible: Beyond the scope of comprehension or understanding.
Noncongratulatory: Not expressing congratulations or praise.
Nonconservational: Not related to conservation or the preservation of resources.
Nonconspiratorial: Not involving or characteristic of conspiracy, a secret plan or agreement.
Nonconstitutional: Not in accordance with a constitution or the principles of a constitution.
Nonconversational: Not pertaining to or suitable for conversation or communication.
Noncrystallizable: Not capable of being crystallized or forming crystals.
Nondenominational: Not affiliated with or restricted to a specific religious denomination.
Nondiagrammatical: Not conforming to or characterized by diagrams or visual representations.
Nondifferentiable: Not capable of being differentiated or distinguished.
Nondiscriminating: Not showing discrimination or differentiation between different elements.
Nondiscriminative: Not characterized by discrimination or differentiation.
Nondiscriminatory: Not exhibiting discrimination or differentiation.
Nondisintegrating: Not breaking down or disintegrating.
Nondispensational: Not related to dispensation, a system of belief in Christianity.
Nondistinguishing: Not making distinctions or differentiations.
Nondistributional: Not related to distribution, the act of giving out or spreading.
Nonecclesiastical: Not related to or associated with the church or religious organizations.
Nonencyclopedical: Not conforming to or suitable for inclusion in an encyclopedia.
Nonextinguishable: Not capable of being extinguished or put out.
Nonimpressionable: Not easily influenced or affected by impressions or external factors.
Noninterdependent: Not mutually dependent or relying on one another.
Noninterpretative: Not involving or related to interpretation, the act of explaining or understanding.
Nonintersectional: Not involving or related to intersection, the point at which lines or paths cross.
Noninterventional: Not involving intervention, the act of interfering or getting involved.
Nonmeteorological: Not pertaining to meteorology, the study of weather and atmospheric conditions.
Nonmultiplicative: Not involving multiplication, the act of repeated addition.
Nonorthographical: Not conforming to proper spelling or orthography.
Nonpharmaceutical: Not related to pharmaceuticals or medical drugs.
Nonphotographical: Not involving or related to photography.
Nonpresentational: Not involving or related to presentation, the act of showing or displaying.
Nonproportionable: Not capable of being proportioned or scaled properly.
Nonpsychoanalytic: Not conforming to or related to psychoanalysis, a psychological theory and treatment method.
Nonresurrectional: Not related to or associated with resurrection, the act of coming back to life.
Nonsubstitutional: Not capable of serving as a substitute or replacement.
Nontautomerizable: Not capable of existing in different molecular forms (tautomers) under certain conditions.
Nontransferential: Not involving the transfer of something from one entity to another.
Nonunderstandable: Not capable of being understood or comprehended.
Ophthalmometrical: Concerned with the measurement of the eye’s dimensions and characteristics.
Ophthalmoscopical: Relating to the use of an ophthalmoscope, a medical instrument for examining the interior of the eye.
Otolaryngological: Pertaining to the study and treatment of diseases and disorders of the ear, nose, and throat.
Overargumentative: Inclined to engage in excessive or unnecessary arguments.
Overcommunicative: Prone to excessive or abundant communication.
Overconscientious: Excessively attentive to details and responsibilities.
Overgesticulative: Displaying excessive or exaggerated gestures in communication.
Overproportionate: Exhibiting proportions that are larger or more significant than what is considered balanced or appropriate.
Oversophisticated: Overly complex or refined, often to an unnecessary degree.
Oversuperstitious: Excessively reliant on or influenced by superstitions.
Palaeoentomologic: Relating to the study of ancient insects.
Paleoclimatologic: Concerned with the study of ancient climates and climatic changes.
Paleontographical: Pertaining to the description or illustration of fossils.
Parallelepipedous: Having the form of a parallelepiped, a three-dimensional figure with six faces.
Parapsychological: Relating to paranormal phenomena or psychic abilities.
Pharmacodynamical: Concerning the effects and interactions of drugs on the body.
Photoheliographic: Relating to the use of photography to capture images of the sun.
Photolithographic: Pertaining to the process of photolithography, a technique used in printing and microfabrication.
Phytoclimatologic: Relating to the study of the effects of climate on plant life.
Phytogeographical: Concerned with the geographic distribution of plant species.
Phytosociological: Relating to the study of plant communities and their ecological relationships.
Polymorphonuclear: Having a nucleus with multiple lobes, often used to describe certain white blood cells.
Postcartilaginous: Occurring after the development or presence of cartilage.
Postdevelopmental: Relating to stages or processes occurring after development.
Postdiaphragmatic: Situated or occurring after the diaphragm, a muscle separating the chest and abdominal cavities.
Postzygapophyseal: Relating to the postzygapophysis, a structure in vertebral bones.
Postzygapophysial: Pertaining to the postzygapophysis, a part of a vertebra.
Preadministrative: Occurring or existing before administrative actions or procedures.
Preconversational: Taking place before or without conversation or communication.
Preinterpretative: Relating to understanding or interpretation prior to the actual interpretation.
Proadministration: Favoring or supporting administrative actions or policies.
Procentralization: Advocating or promoting centralization of power or authority.
Procollectivistic: In favor of or aligned with collectivism, the emphasis on collective interests over individual interests.
Proconstitutional: In accordance with or supportive of a constitution or its principles.
Proreconciliation: In favor of or promoting the restoration of harmony or reconciliation.
Pseudoanarchistic: Pretending to be related to or advocating anarchism, the absence of government and authority.
Pseudoapplicative: Having the appearance or qualities of being applicable.
Pseudobenefactory: Imitating or pretending to have beneficial qualities.
Pseudocommissural: Falsely appearing to be commissural, relating to nerve fibers.
Pseudocompetitive: Pretending or falsely claiming to be competitive.
Pseudocotyledonal: Having characteristics that falsely resemble cotyledons, the embryonic leaves of a plant.
Pseudocrystalline: Falsely resembling or imitating a crystalline structure.
Pseudodiphtherial: Pretending to be related to or resembling diphtheria, a bacterial infection.
Pseudoeducational: Pretending or imitating the educational process.
Pseudoevangelical: Falsely or imitatively evangelical, related to the Christian gospel.
Pseudoindependent: Falsely appearing or pretending to be independent.
Pseudolegislative: Imitating or falsely resembling legislative actions or procedures.
Pseudoministerial: Pretending to be related to ministerial duties or positions.
Pseudoporphyritic: Falsely resembling or imitating porphyritic texture, a rock texture characterized by large crystals in a fine-grained matrix.
Pseudoprophetical: Falsely or imitatively prophetic, related to predicting future events.
Pseudoreformatory: Pretending to be related to reform or the process of improving.
Pseudoresidential: Falsely appearing or imitating residential qualities.
Pseudosensational: Pretending or falsely appearing to be sensational or exciting.
Pseudosocialistic: Falsely or imitatively related to socialism, a political and economic theory.
Pseudostalactitic: Falsely resembling or imitating a stalactite, a mineral formation hanging from the roof of a cave.
Pseudostalagmitic: Falsely resembling or imitating a stalagmite, a mineral formation rising from the floor of a cave.
Pseudosymptomatic: Falsely or imitatively showing symptoms, signs, or characteristics of a condition.
Psychotherapeutic: Concerned with the treatment of mental or emotional disorders through psychotherapy.
Quantummechanical: Relating to the principles and theories of quantum mechanics, a branch of physics.
Quartermasterlike: Resembling or characteristic of a quartermaster, a person responsible for supply and logistics.
Reconstructionary: Relating to or promoting the process of reconstruction, restoration, or rebuilding.
Scrophulariaceous: Belonging to the Scrophulariaceae family of flowering plants.
Semianthropologic: Pertaining to the study of human characteristics, often with a focus on physical attributes.
Semiarchitectural: Partly or somewhat related to architecture, the design and construction of buildings.
Semicommunicative: Partly or somewhat involving communication or sharing information.
Semideterministic: Exhibiting partial determinism, the idea that events have both determined and indeterminate factors.
Semifictionalized: Partially fictionalized or presented in a partly fictional manner.
Semimaterialistic: Involving elements of materialism, the emphasis on material possessions and comfort.
Semimountainously: In a manner that is partly hilly or mountainous.
Seminationalistic: Relating to the partial promotion or emphasis on nationalism, the love and support for one’s country.
Semiphilosophical: Partially related to philosophy or resembling philosophical thought.
Semipsychological: Partially related to psychology or having psychological qualities.
Semireverberatory: Exhibiting partial reverberation, the reflection of sound waves.
Sphygmomanometric: Concerned with the measurement of blood pressure using a sphygmomanometer.
Stenothermophilic: Thriving or existing in a narrow range of temperatures, often referring to specific microorganisms.
Subadministrative: Pertaining to levels or functions beneath or subordinate to administrative roles.
Subcompensational: Involving or leading to partial compensation or offsetting.
Subtrochleariform: Resembling or having the form of a subtrochlear structure, often referring to bones or muscles.
Superaccomplished: Highly accomplished or achieving success to an extraordinary degree.
Supercatastrophic: Extremely catastrophic or leading to massive destructive events.
Supercatholically: In an extremely or highly catholic manner, often referring to universality or comprehensiveness.
Superconservative: Extremely conservative or resistant to change.
Supermathematical: Going beyond or exceeding traditional mathematical concepts or ideas.
Supermetropolitan: Extremely metropolitan or characteristic of a large, urban area.
Supernaturalistic: Relating to or characterized by supernatural phenomena or beliefs.
Superregenerative: Exhibiting extremely rapid or intense regeneration.
Supersensualistic: Pertaining to a highly refined or heightened level of sensuality or perception.
Supertranscendent: Going beyond or exceeding traditional concepts of transcendence.
Supranaturalistic: Beyond or exceeding the realm of natural phenomena, often referring to the supernatural.
Thalassographical: Concerned with the mapping or study of the ocean’s depths and characteristics.
Thermoluminescent: Exhibiting the phenomenon of thermoluminescence, where a material emits light upon heating.
Turbosupercharged: Equipped with a turbocharger that compresses and forces air into an internal combustion engine.
Unanachronistical: Not conforming to or characteristic of a certain time period.
Uncircumscribable: Not capable of being circumscribed or confined within limits.
Uncontemporaneous: Not occurring or existing during the same period of time.
Uncounterbalanced: Not properly balanced or counteracted.
Uncountermandable: Not capable of being countermanded or revoked.
Undemonstrational: Not involving or exhibiting demonstration, the act of proving something.
Underaccommodated: Not properly or adequately accommodated or adjusted.
Underproportioned: Not having appropriate or balanced proportions.
Undistinguishable: Impossible to differentiate or perceive as distinct.
Uninterchangeable: Not capable of being exchanged or replaced with something else.
Unlexicographical: Not conforming to the rules or principles of lexicography, the practice of compiling dictionaries.
Unparticularising: Not making something less specific or detailed.
Unparticularizing: Not making something less specific or detailed.
Unprognosticative: Not capable of being predicted or foretold.
Unreconstructible: Not capable of being reconstructed or restored.
Unsentimentalised: Not made more objective or pragmatic by the removal of sentimentality.
Unsentimentalized: Not made more objective or pragmatic by the removal of sentimentality.
Unstraightforward: Not straightforward or honest in behavior or intentions.
Untrigonometrical: Not conforming to or related to trigonometry, a branch of mathematics.
Ureterointestinal: Relating to the connection or relationship between the ureter and the intestines.
