Difficult words starting with I

definitions & notes only words
  1. importune
    beg persistently and urgently
  2. illicit
    contrary to accepted morality or convention
  3. incarcerate
    lock up or confine, in or as in a jail
  4. indigent
    poor enough to need help from others
  5. insurmountable
    not capable of being overcome
  6. incontinent
    not having control over urination and defecation
  7. imposture
    pretending to be another person
  8. impertinent
    improperly forward or bold
  9. inscrutable
    of an obscure nature
  10. incendiary
    capable of catching fire spontaneously
  11. indomitable
    impossible to subdue
  12. impregnable
    immune to attack; incapable of being tampered with
  13. impede
    be a hindrance or obstacle to
  14. imprudent
    not wise
  15. incredulous
    not disposed or willing to believe; unbelieving
  16. inflict
    impose something unpleasant
  17. infirmity
    the state of being weak in health or body
  18. incapacitate
    make unable to perform a certain action
  19. indignation
    a feeling of righteous anger
  20. imponderable
    difficult or impossible to evaluate with precision
  21. imperil
    pose a threat to; present a danger to
  22. infest
    occupy in large numbers or live on a host
  23. implicit
    implied though not directly expressed
  24. incongruity
    the quality of disagreeing
  25. innocuous
    not injurious to physical or mental health
  26. innuendo
    an indirect and usually malicious implication
  27. invigorate
    give life or energy to
  28. impinge
    advance beyond the usual limit
  29. indubitable
    too obvious to be doubted
  30. incumbent
    necessary as a duty or responsibility; morally binding
  31. impale
    pierce with a sharp stake or point
  32. impenitent
    not remorseful
  33. inane
    devoid of intelligence
  34. interim
    the time between one event, process, or period and another
  35. imbue
    spread or diffuse through
  36. inveigle
    influence or urge by gentle urging, caressing, or flattering
  37. incarnate
    possessing or existing in bodily form
  38. indecision
    the trait of irresolution
  39. ichthyology
    the branch of zoology that studies fishes
  40. itinerant
    traveling from place to place to work
  41. intimidate
    to compel or deter by or as if by threats
  42. intimate
    marked by close acquaintance, association, or familiarity
  43. indolent
    disinclined to work or exertion
  44. implore
    call upon in supplication
  45. impoverish
    make poor
  46. ineffable
    defying expression or description
  47. infallible
    incapable of failure or error
  48. immure
    lock up or confine, in or as in a jail
  49. inadvertently
    without knowledge or intention
  50. intercede
    act between parties with a view to reconciling differences
  51. inquisitor
    a questioner who is excessively harsh
  52. indict
    accuse formally of a crime
  53. industrious
    characterized by hard work and perseverance
  54. ingenuous
    lacking in sophistication or worldliness
  55. ingrate
    a person who shows no gratitude
  56. iota
    a tiny or scarcely detectable amount
  57. indemnify
    secure against future loss, damage, or liability
  58. impolitic
    not marked by artful prudence
  59. indelible
    cannot be removed or erased
  60. impromptu
    with little or no preparation or forethought
  61. inebriated
    stupefied or excited by a chemical substance
  62. insurrection
    organized opposition to authority
  63. idiosyncrasy
    a behavioral attribute peculiar to an individual
  64. irreconcilable
    impossible to bring into accord
  65. impalpable
    not perceptible to the touch
  66. impetus
    a force that moves something along
  67. impetuous
    characterized by undue haste and lack of thought
  68. isthmus
    a narrow strip of land connecting two larger land areas
  69. impending
    close in time; about to occur
  70. imminent
    close in time; about to occur
  71. irate
    feeling or showing extreme anger
  72. inter
    place in a grave or tomb
  73. irksome
    so lacking in interest as to cause mental weariness
  74. infidel
    a person who does not acknowledge your god
  75. incubate
    grow under conditions that promote development
  76. intractable
    difficult to manage or mold
  77. intrigue
    a crafty and involved plot to achieve your ends
  78. inculcate
    teach and impress by frequent repetitions or admonitions
  79. iconoclast
    someone who attacks cherished ideas or institutions
  80. impiety
    unrighteousness by virtue of lacking respect for a god
  81. inchoate
    only partly in existence; imperfectly formed
  82. inalienable
    incapable of being repudiated or transferred to another
  83. ignominy
    a state of dishonor
  84. intransigent
    impervious to pleas, persuasion, requests, reason
  85. improvise
    manage in a makeshift way; do with whatever is at hand
  86. interloper
    someone who intrudes on the privacy or property of another
  87. incognito
    without revealing one's identity
  88. imprecation
    the act of calling down a curse that invokes evil
  89. insatiable
    impossible to satisfy
  90. insalubrious
    detrimental to health
  91. interregnum
    the time between two reigns or governments
  92. irrefutable
    impossible to deny or disprove
  93. inveigh
    complain bitterly
  94. infraction
    a crime less serious than a felony
  95. incisive
    demonstrating ability to recognize or draw fine distinctions
  96. impute
    attribute or credit to
  97. incorrigible
    impervious to correction by punishment
  98. ingratiate
    gain favor with somebody by deliberate efforts
  99. invidious
    containing or implying a slight or showing prejudice
  100. inerrancy
    exemption from mistakes
  101. imbibe
    take in liquids
  102. invocation
    the act of appealing for help
  103. lionize
    assign great social importance to
  104. incinerate
    become reduced to ashes
  105. imperious
    having or showing arrogant superiority to
  106. inamorata
    a woman with whom you are in love
  107. incrustation
    the formation of a crust
  108. imprudent
    not wise
  109. immaculate
    completely neat and clean
  110. inanimate
    not endowed with life
  111. invective
    abusive language used to express blame or censure
  112. inebriate
    make drunk (with alcoholic drinks)
  113. incriminate
    suggest that someone is guilty
  114. illusory
    having the nature of a deceptive trick
  115. inimical
    not friendly
  116. inkling
    a slight suggestion or vague understanding
  117. impassioned
    characterized by intense emotion
  118. irrevocable
    incapable of being retracted
  119. ineffectual
    not producing an intended consequence
  120. immutable
    not subject or susceptible to change or variation
  121. insinuate
    give to understand
  122. insensate
    devoid of feeling and consciousness and animation
  123. impugn
    attack as false or wrong
  124. insipid
    lacking interest or significance or impact
  125. incantation
    a ritual reciting of words believed to have a magical effect
  126. innate
    present at birth but not necessarily hereditary
  127. indenture
    formal agreement as to terms of a debt
  128. indoctrinate
    teach uncritically
  129. incipient
    only partly in existence; imperfectly formed
  130. inundate
    fill or cover completely, usually with water
  131. insidious
    working or spreading in a hidden and usually injurious way
  132. indite
    produce a literary work
  133. interject
    to insert between other elements
  134. incense
    make furious
  135. idyllic
    charmingly simple and serene
  136. incorporeal
    without material form or substance
  137. interminable
    tiresomely long; seemingly without end
  138. insomnia
    an inability to sleep
  139. itinerary
    an established line of travel or access
  140. impropriety
    the condition of being unsuitable
  141. indissoluble
    incapable of being broken up
  142. incredulity
    doubt about the truth of something
  143. inductive
    proceeding from particular facts to a general conclusion
  144. incontrovertible
    impossible to deny or disprove
  145. inept
    generally incompetent and ineffectual
  146. impudence
    the trait of being rude and impertinent
  147. impeccable
    without fault or error
  148. ignoble
    completely lacking nobility in character or purpose
  149. intrepid
    invulnerable to fear or intimidation
  150. improvident
    not supplying something useful for the future
  151. impasse
    a situation in which no progress can be made
  152. induct
    place ceremoniously or formally in an office or position
  153. imbroglio
    an intricate and confusing interpersonal situation
  154. infantile
    indicating a lack of maturity
  155. incursion
    the act of entering some territory or domain
  156. insuperable
    incapable of being surmounted or excelled
  157. irascible
    quickly aroused to anger
  158. immolate
    offer as a sacrifice by giving up to destruction
  159. insouciant
    marked by unconcern
  160. inexorable
    not to be placated or appeased or moved by entreaty
  161. inveterate
    habitual
  162. ingrained
    deeply rooted; firmly fixed or held
  163. intricate
    having many complexly arranged elements; elaborate
  164. infringe
    advance beyond the usual limit
  165. ineluctable
    impossible to avoid or evade
  166. insularity
    the state of being isolated or detached
  167. interdict
    command against
  168. irreproachable
    free of guilt; not subject to blame
  169. impuissance
    powerlessness revealed by an inability to act
  170. impecunious
    not having enough money to pay for necessities
  171. inured
    made tough by habitual exposure
  172. iniquitous
    characterized by injustice or wickedness
  173. imbecility
    mental retardation
  174. infernal
    characteristic of or resembling Hell
  175. incite
    provoke or stir up
  176. inopportune
    not suitable for a purpose
  177. ingenue
    an artless innocent young girl
  178. internecine
    within a group or organization
  179. inclement
    severe, of weather
  180. impediment
    something immaterial that interferes with action or progress
  181. imbed
    fix or set securely or deeply
  182. implicate
    bring into intimate and incriminating connection
  183. impeach
    bring an accusation against
  184. indefatigable
    showing sustained enthusiasm with unflagging vitality
  185. interstice
    small opening between things