unthinkable

(-t̸hiŋkə bəl)

adjective

  1. beyond the ability to understand or imagine; inconceivable
  2. so extreme, foul, etc. as to be unfit to be imagined or considered: unthinkable war crimes

Origin: ME unthenkable

Related Forms:

See unthinkable in American Heritage Dictionary 4

adjective
  1. Impossible to imagine; inconceivable: an unthinkable amount of money.
  2. Contrary to what is plausible or probable: That this project would achieve ultimate success was unthinkable at the time.
  3. Not to be thought of or considered; out of the question: Raising taxes was politically unthinkable.

Related Forms:

  • un·thinkˌa·bilˈi·ty, un·thinkˈa·ble·ness noun
  • un·thinkˈa·bly adverb

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