Are you looking for adjectives that start with the letter “I”? You’ve come to the right place! This comprehensive list of 1,487 words is arranged alphabetically, and contains some of the most commonly used adjectives in the English language.
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From ‘illegal’ to ‘insurmountable’, this list provides examples of adjectives that start with the letter ‘I’. ‘Illegal’ means prohibited by law or against the rules. ‘Insolvable’ means impossible to solve or untangle. ‘Interzooecial’ means existing or occurring between different species. ‘Interpretational’ means relating to interpretation or explanation. ‘Insurmountable’ means too difficult to overcome or surpass.
Whether you are writing a story, essay, or just need a word to describe something, this list of adjectives that start with ‘I’ should be helpful.
The words arranged in the lists below are in alphabetical order, from left to right and down.
List Of 3-Letter Adjectives Starting With “i”
icy
List Of 4-Letter Adjectives Starting With “i”
iced
icky
iffy
inky
Related resource: List Of Nouns Ending In “M”
List Of 5-Letter Adjectives Starting With “i”
icier
ictic
idled
ileac
iliac
imido
imino
impar
inapt
inept
inert
iodic
ionic
irate
isiac
itchy
ivied
List Of 6-Letter Adjectives Starting With “i”
iatric
iciest
ickier
iconic
idaean
idlest
idling
imidic
immane
impish
impure
inbond
inborn
inbred
incaic
incult
indign
indoor
infelt
infirm
inkier
inlaid
inmost
innate
insane
intact
intime
intoed
intown
iodous
irenic
iridic
iritic
ironic
isaian
List Of 7-Letter Adjectives Starting With “i”
iceless
icelike
icicled
ickiest
icteric
ideaful
identic
idiotic
idyllic
igneous
ignoble
iliadic
illegal
illicit
immense
immoral
impavid
impious
implied
inbound
incised
incivil
indrawn
inexact
ingrown
inhuman
injured
inkiest
inkless
inklike
inlying
innless
inphase
insides
insipid
inswept
intense
intimal
inutile
iracund
ireless
iridous
irksome
islamic
isleted
isoamyl
isodose
issuant
itchier
iterant
ithacan
ivylike
List Of 8-Letter Adjectives Starting With “i”
ibsenian
icebound
ichorous
ichthyic
idealess
ideative
idoistic
idoneous
ignorant
illiquid
illusive
illusory
illuvial
imaginal
imitable
immanent
immature
immersed
imminent
immobile
immodest
immotile
impacted
implicit
impolite
imposing
impotent
improper
impudent
inactive
incisive
incisory
included
increate
incubous
incudate
indebted
indecent
indented
indevout
indicial
indirect
indocile
indolent
indusial
inedible
inedited
inerrant
inertial
inexpert
infamous
infecund
infernal
infinite
inflated
inflexed
informal
informed
infusive
inguinal
inherent
inhumane
inimical
insectan
insecure
inserted
insolent
instable
intortus
intrepid
introrse
inturned
inundant
inurbane
invasive
invected
inviable
inviting
involved
ironical
ironless
ironlike
irrorate
ischemic
isidioid
isleless
isobaric
isocyano
isodomic
isolable
isomeric
isonomic
isoporic
isotimic
isotonic
isotopic
isotypic
issuable
isthmian
isthmoid
itchiest
ixionian
Related resource: List Of Nouns Ending In “S”
List Of 9-Letter Adjectives Starting With “i”
ideaistic
identical
ideologic
ideomotor
idiomatic
ignitable
ignitible
ignorable
ileocecal
illegible
illiberal
illogical
imageable
imagerial
imaginary
imagistic
imbecilic
imitative
immediate
immovable
immusical
immutable
impactful
impactive
impartial
impassive
impatient
impeccant
impedible
impendent
impending
impennate
imperious
impetuous
impingent
impolitic
important
imposable
imprecise
imprudent
impulsive
imputable
inanimate
inaudible
incapable
incessant
incipient
incisural
inclement
inclusive
incompact
incondite
incorrect
incorrupt
incretory
incurious
incurrent
incursive
indelible
indexical
indexless
indignant
inducible
inductile
inductive
indulgent
indusiate
ineffable
inelastic
inelegant
inequable
inerratic
inexpiate
infantile
infantine
infarcted
infectant
infective
inferable
inferible
infertile
infuscate
infusible
ingenious
ingenuous
ingestive
ingrained
ingrowing
inhabited
inherited
injurable
injurious
innermost
innocuous
innoxious
inodorous
inorganic
inotropic
inquiring
insatiate
insectean
insectile
insensate
insidious
insincere
insipient
insistent
insoluble
insulting
insurable
integrant
interalar
interbank
intercity
interclub
intergilt
interrace
interroad
intershop
interteam
intertown
interword
intimiste
intricate
intrinsic
intrusive
intuitive
invadable
inventive
inversive
invidious
inviolate
invocable
inwrought
ionisable
ionizable
ionogenic
irascible
ironbound
irradiant
irrigable
irriguous
irritable
irruptive
isandrous
isanthous
isauxetic
ischaemic
ischiadic
isidorian
islandish
isobathic
isocarpic
isochimal
isochoric
isocratic
isogamous
isogenous
isohyetal
isolating
isolative
isologous
isomerous
isonomous
isopentyl
isopodous
isosceles
isosmotic
isostatic
isosteric
isotactic
isotheral
isotropic
issueless
iterative
ivorylike
List Of 10-Letter Adjectives Starting With “i”
iatrogenic
ichthyotic
iconodulic
iconomatic
idealistic
ideational
idempotent
idiocratic
idiopathic
idiophonic
idiotropic
idolatrous
illaudable
illhumored
illusioned
imaginable
immaculate
immaterial
immemorial
immersible
immiscible
immoderate
impairable
impalpable
impartable
impartible
impassable
impassible
impeccable
impeditive
impenitent
impersonal
impervious
implacable
implorable
importable
impossible
impostrous
impressive
improbable
improvable
impugnable
impuissant
impunitive
imputative
inaccurate
inadequate
inappetent
inapposite
inarguable
inartistic
incautious
incestuous
inclinable
includable
includible
incogitant
incoherent
incomeless
incomplete
inconstant
increasing
incredible
increscent
incubative
incubatory
inculpable
incurrable
indagative
indecisive
indecorous
indefinite
indelicate
indicatory
indictable
indigenous
indigested
indiscreet
indiscrete
indisposed
indistinct
indorsable
indurative
industrial
ineducable
ineloquent
ineludible
inerasable
inevasible
inexistent
inexorable
inexpiable
inexplicit
infantlike
infatuated
infeasible
infectious
inferrible
inflective
inflexible
inflictive
influenzal
informable
infrahuman
infrasonic
infrequent
infusorial
ingestible
inglorious
inharmonic
inhibitory
inimitable
iniquitous
initiatory
injectable
injunctive
innominate
innovative
innovatory
inoculable
inoperable
inordinate
inquirable
insanitary
insatiable
insectival
insectlike
insensible
insentient
insertable
insightful
insociable
insolvable
insomnious
insouciant
inspective
inspirable
insultable
intarsiate
integrable
intemerate
interaulic
interaural
interaxial
intercaste
intercivic
interclass
interested
interfaith
interfilar
intergroup
intergular
intergyral
interhemal
interhuman
interionic
interjugal
interlobar
interlocal
interlunar
intermalar
intermolar
intermural
internasal
internidal
internodal
interoptic
interparty
interpolar
interpubic
interramal
interrenal
intertidal
intervalic
interzonal
intestable
intestinal
intolerant
intramural
intrastate
intravital
intuitable
inundatory
invaluable
inventable
inventible
invertible
investable
investible
inveterate
invincible
inviolable
invocative
invocatory
involucral
iodimetric
iodometric
iridaceous
iridescent
ironfisted
ironhanded
irrational
irrelative
irrelevant
irremeable
irresolute
irreverent
irrigative
irritative
isacoustic
iscariotic
isentropic
islandless
islandlike
isochasmic
isocheimal
isocheimic
isochronal
isochroous
isodynamic
isoelastic
isoglossal
isographic
isolatable
isomorphic
isopachous
isopiestic
italianate
List Of 11-Letter Adjectives Starting With “i”
icosahedral
ideographic
idioblastic
idiodynamic
idioglottic
idiographic
idiomorphic
idioplasmic
ignominious
illimitable
illtempered
illuminable
illusionary
illustrious
imaginative
imbricative
imitational
immedicable
immigratory
immitigable
immunogenic
immunologic
impassioned
impeachable
impecunious
imperatival
imperforate
impermanent
impermeable
impertinent
impetrative
impetratory
implacental
implausible
impleadable
implemental
implicative
implicatory
imploratory
importunate
imposturous
impoundable
impractical
imprecatory
impregnable
impressible
improvident
inadaptable
inadvertent
inadvisable
inalienable
inalterable
inattentive
incalescent
incantatory
incapacious
inclinatory
incoercible
incogitable
incognizant
incompliant
incongruent
incongruous
inconsonant
incorporeal
increasable
incredulous
incremental
inculcative
inculpatory
incunabular
indeciduate
indeciduous
indefective
indefinable
indehiscent
indicatable
indictional
indifferent
indigestive
indivisible
indomitable
indubitable
induplicate
industrious
ineffective
ineffectual
inefficient
ineluctable
inenarrable
inequitable
inequivalve
inescapable
inestimable
inexcusable
inexpedient
inexpensive
inexplosive
inferential
infinitival
inflexional
inflictable
influential
informative
infortunate
infracostal
infrangible
inhabitable
inheritable
inhibitable
injudicious
innerspring
innumerable
inobservant
inoculative
inoffensive
inofficious
inoperative
inopportune
inquilinous
inquisitive
inscribable
inscriptive
inscrutable
insensitive
inseparable
insertional
insessorial
inseverable
insinuating
insinuative
insomnolent
inspectable
inspectoral
inspirative
inspiratory
instigative
instinctive
institutive
instructive
insuperable
integrative
intelligent
intemperate
intensional
intentional
intentioned
interactive
interastral
interatomic
interatrial
interbanded
interbedded
interbranch
interbreath
intercalary
intercarpal
interchurch
intercosmic
intercostal
intercounty
intercrinal
intercrural
intercystic
interdental
interdorsal
interempire
interesting
interfacial
interfamily
interfluent
intergonial
interhaemal
interisland
interjacent
interlabial
interlineal
interlinear
interlobate
interlucent
interludial
intermarine
internarial
internation
internecine
internetted
interneural
interocular
interoffice
interportal
interracial
interradial
interregnal
interrupted
interseptal
intersexual
intersocial
intersonant
interspinal
intersporal
intersticed
interstream
interstreet
interstrial
intersystem
intertarsal
intertergal
intertribal
interveinal
interverbal
intervolute
interxylary
intolerable
intoxicable
intoxicated
intractable
intradermal
intraspinal
intravenous
intrusional
intuitional
intumescent
invaginable
inventional
inventorial
investitive
involucrate
involuntary
ionospheric
ipsilateral
irradiative
irrecusable
irreducible
irrefutable
irreligious
irremovable
irreparable
irresoluble
irretentive
irrevocable
isanomalous
isenthalpic
isocephalic
isoceraunic
isochronous
isoelectric
isokeraunic
isolecithal
isomorphous
isonephelic
isopetalous
isorhythmic
israelitish
List Of 12-Letter Adjectives Starting With “i”
ichnographic
ichnological
ichthyolitic
ichthyologic
iconoclastic
iconographic
iconolatrous
iconological
identifiable
idiocratical
illegitimate
illuminating
illuminative
illustrative
imbibitional
immeasurable
immensurable
immethodical
impassionate
impeccunious
impedimental
impenetrable
imperatorial
imperceptive
impercipient
imperishable
impetiginous
impoverished
impregnatory
impressional
imprisonable
inaccessible
inadmissible
inappeasable
inappellable
inapplicable
inarticulate
inartificial
inauspicious
incalculable
incandescent
incidentless
incommodious
incommutable
incomparable
incomputable
inconclusive
inconsequent
inconsistent
inconsolable
inconsumable
incontinuous
inconvenient
incoordinate
incorporable
incorporated
incrassative
incretionary
incubational
indeclinable
indefeasible
indefectible
indefensible
indeliberate
indigestible
indisputable
indissoluble
indivertible
indologenous
ineffaceable
ineradicable
inexplicable
inexpressive
inexpugnable
inexpungible
inextensible
inextirpable
inextricable
infanticidal
infelicitous
infiltrative
inflammatory
inflationary
inflectional
inflorescent
infundibular
ingratiating
ingratiatory
ingravescent
inharmonious
inhospitable
innovational
innutritious
inoxidizable
insalubrious
insecticidal
inspectional
inspectorial
instructible
insufferable
insufficient
intellective
intelligible
interacinous
interangular
interannular
interbrigade
intercarotid
intercentral
interceptive
intercessory
interciliary
intercollege
intercompany
intercotylar
intercranial
intercurrent
interdictory
interdigital
interfemoral
interfertile
interfibrous
interfluvial
interfrontal
interfulgent
interhostile
interinsular
interjectory
interjugular
interkinetic
interlaminar
interlibrary
interlobular
interlocular
intermammary
intermastoid
intermembral
interminable
intermissive
intermittent
intermixable
intermontane
intermundane
internuclear
internuncial
interoceanic
interolivary
interorbital
interosseous
interpleural
interpolable
interposable
interpretive
interrailway
interrelated
interrogable
interruptive
interscience
intersectant
interseminal
intersociety
intersoluble
interspatial
interspecial
interspheral
interspinous
interstation
interstellar
intertissued
intertuberal
intertubular
interungular
intervaginal
intervarsity
interveinous
interventral
intervenular
intervillous
intervocalic
interwrought
intimidatory
intonational
intoxicative
intracardiac
intracranial
intramundane
intransitive
intranuclear
intrapsychic
intrauterine
introducible
introductory
intromissive
intromittent
introversive
investigable
invigorative
invitational
involucelate
invulnerable
irrebuttable
irredeemable
irreformable
irrefragable
irregardless
irrelievable
irremediable
irremissible
irrepealable
irresistible
irresolvable
irrespirable
irresponsive
irreversible
irrigational
irrotational
iscariotical
ishmaelitish
isocheimenal
isochromatic
isodiametric
isodimorphic
isographical
isopolitical
isostemonous
isothiocyano
italianesque
iatrochemical
ideographical
idiochromatic
idioplasmatic
idiorrhythmic
idiosyncratic
illusionistic
illustratable
imaginational
immigrational
immunogenetic
immunological
imparipinnate
impedimentary
imperceptible
imperfectible
imperialistic
impermissible
imperturbable
implicational
impracticable
improvisatory
imputrescible
inappreciable
inappropriate
incantational
incarcerative
incarnational
inclinational
inconceivable
incondensable
inconsecutive
inconsiderate
inconspicuous
incontestable
inconvertible
inconvincible
incorporating
incorporative
incorruptible
incriminatory
indefatigable
indescribable
indeterminate
indiscernible
indistinctive
inductionless
inefficacious
inequilateral
inexhaustible
inexperienced
inexplainable
inexpressible
inflexionless
influenceable
influenzalike
informational
inframarginal
infundibulate
inhomogeneous
innervational
inquisitional
inquisitorial
inscriptional
insectivorous
insignificant
inspirational
instantaneous
institutional
instructional
instructorial
insubstantial
insupportable
insusceptible
integumentary
intentionless
interacademic
interactional
interadditive
interalveolar
interartistic
interaxillary
interbrachial
intercalative
intercardinal
intercellular
intercerebral
interchondral
interclerical
intercolonial
intercolumnal
intercolumnar
intercommunal
intercondylar
intercondylic
intercoracoid
intercortical
intercuspidal
interdistrict
interepidemic
intergalactic
interglobular
intergranular
interimperial
interjectural
interlamellar
interlocutory
intermanorial
intermarginal
intermetallic
intermuscular
interneuronic
interoceptive
interparental
interparietal
interpectoral
interpersonal
interpetaloid
interpetalous
interpetiolar
interpolative
interpressure
interpretable
interproximal
interregional
interruptible
interscapular
interseaboard
intersesamoid
intershifting
intersidereal
intersocietal
interspicular
interstaminal
interterminal
interthreaded
intertropical
interungulate
intervalvular
intervarietal
intervascular
interviewable
interzooecial
intracellular
intramarginal
intramuscular
intranational
intratelluric
intravascular
intromissible
intropunitive
introspective
intuitionless
inventionless
inventoriable
investigative
investigatory
irreclaimable
irrecoverable
irrefrangible
irreplaceable
irrepleviable
irrepressible
irresponsible
irretraceable
irretrievable
isodimorphous
isoelectronic
isogeothermal
isogeothermic
isoperimetric
isospondylous
isostructural
List Of 14-Letter Adjectives Starting With “i”
ichnographical
ichthyographic
ichthyological
ichthyophagous
ichthyosaurian
ichthyosauroid
illuminational
illustrational
immortalisable
immortalizable
imparisyllabic
impressionable
impressionless
inappreciative
inapprehensive
inapproachable
incommensurate
incommunicable
incompressible
inconsiderable
incontrollable
indecipherable
indecomposable
indemonstrable
indestructible
indeterminable
indiscerptible
indiscoverable
indiscriminate
inferoanterior
inflectionless
institutionary
instructorless
insuppressible
insurmountable
insurrectional
intelligential
interaccessory
interapophysal
interarticular
interarytenoid
interauricular
interavailable
interbranchial
interbronchial
intercapillary
intercatenated
intercausative
intercavernous
intercessional
intercessorial
intercoccygeal
intercondyloid
intercontorted
intercorporate
interdependent
interdiffusive
interestuarine
interfactional
interfenestral
interferential
interfibrillar
interfraternal
interglandular
interjectional
intermalleolar
intermaxillary
intermediatory
intermeningeal
intermenstrual
intermetameric
intermolecular
intermomentary
intermunicipal
interpalpebral
interpapillary
interpenetrant
interpervasive
interplacental
interplanetary
interpretative
interprismatic
interpterygoid
interpulmonary
interpupillary
interreligious
interrepellent
interreticular
intersectional
intersegmental
interthronging
interventional
intervertebral
intervesicular
intraabdominal
intramolecular
introspectable
introspectible
iridopupillary
irreplevisable
irreproachable
List Of 15-Letter Adjectives Starting With “i”
immunogenetical
imperscriptible
imprescriptible
impressionistic
improvisational
inapprehensible
incommunicative
incomprehensive
inconsecutively
inconsequential
indemnificatory
indeterministic
indiscretionary
individualistic
infundibuliform
inscriptionless
interapophyseal
interasteroidal
intercarpellary
interchangeable
interclavicular
intercollegiate
intercomparable
interconciliary
interdependable
interepithelial
interfascicular
interferometric
interfoliaceous
interganglionic
intergenerating
intergenerative
interindividual
interinhibitive
interjaculatory
interlaboratory
interlacustrine
intermammillary
intermandibular
intermeasurable
intermembranous
intermesenteric
intermetacarpal
intermetatarsal
interparliament
interparoxysmal
interpeduncular
interpenetrable
interphalangeal
interprovincial
interregimental
interrogational
interscholastic
intersubjective
intersystematic
intertentacular
intertrabecular
intertubercular
interuniversity
introspectional
intussusceptive
investigational
irrationalistic
isobathythermal
isobathythermic
isoperimetrical
isothermobathic
List Of 16-Letter Adjectives Starting With “i”
incomprehensible
incontrovertible
indiscriminating
indiscriminative
inextinguishable
interbelligerent
intercommissural
interconsonantal
intercontinental
interconvertible
intercorpuscular
intercrystalline
interdestructive
interequinoctial
interfilamentary
interfilamentous
intergradational
interhemispheric
interlatitudinal
interligamentary
interligamentous
interministerial
interparenchymal
interparenthetic
interpenetrative
interpretational
interresponsible
intersentimental
interterritorial
intertransversal
interventricular
isoagglutinative
indistinguishable
intellectualistic
intercommunicable
interconfessional
interdepartmental
interdisciplinary
intergovernmental
interprofessional
interproglottidal
interproportional
interprotoplasmic
intersystematical
List Of 18-Letter Adjectives Starting With “i”
intercartilaginous
intercommunicative
intercomplimentary
intercontradictory
interparenthetical
interparliamentary
intertransformable
