inadvertent

  1. happening by chance or unexpectedly or unintentionally

    Synonyms : accidental
    Examples :
    • with an inadvertent gesture she swept the vase off the table

impromptu

  1. with little or no preparation or forethought

    Synonyms : ad-lib, extemporaneous, extemporary, extempore, off-the-cuff, offhand, offhanded, unrehearsed
    Examples :
    • an impromptu speech
  2. without advance preparation

    Synonyms : ad lib, ad libitum, spontaneously
  3. an extemporaneous speech or remark

    Type Of : address, speech
    Examples :
    • a witty impromptu must not sound premeditated
  4. a short musical passage that seems to have been made spontaneously without advance preparation

    Type Of : musical passage, passage

impoverished

  1. poor enough to need help from others

    Synonyms : destitute, indigent, necessitous, needy, poverty-stricken
  2. destroyed financially

    Synonyms : broken, wiped out

impious

  1. lacking due respect or dutifulness

    Synonyms : undutiful
    Examples :
    • impious toward one's parents
  2. lacking piety or reverence for a god

    Antonyms : pious

impecunious

  1. not having enough money to pay for necessities

    Synonyms : hard up, in straitened circumstances, penniless, penurious, pinched

impartial

  1. free from undue bias or preconceived opinions

    Synonyms : unprejudiced
    Examples :
    • the impartial eye of a scientist
  2. showing lack of favoritism

    Antonyms : partial
    Examples :
    • the cold neutrality of an impartial judge

immutable

  1. not subject or susceptible to change or variation in form or quality or nature

    Synonyms : changeless
    Antonyms : mutable
    Examples :
    • the view of that time was that all species were immutable, created by God
  2. constant and unchanging

    Examples :
    • the immutable laws of nature

immoderate

  1. beyond reasonable limits

    Antonyms : moderate
    Examples :
    • immoderate laughter
    • immoderate spending

illusory

  1. based on or having the nature of an illusion

    Synonyms : illusive
    Examples :
    • Secret activities offer presidents the alluring but often illusory promise that they can achieve foreign policy goals without the bothersome debate and open decision that are staples of democracy

illuminate

  1. make free from confusion or ambiguity; make clear

    Synonyms : clear, clear up, crystalise, crystalize, crystallise, crystallize, elucidate, enlighten, shed light on, sort out, straighten out
    Type Of : clear up, clarify, elucidate
  2. make lighter or brighter

    Synonyms : illume, illumine, light, light up
    Type Of : lighten up, lighten
  3. add embellishments and paintings to (medieval manuscripts)

    Type Of : embellish, adorn, beautify, decorate, grace, ornament