- not to be contemplated; out of the question
- unimaginable; inconceivable
- unreasonable; improbable
unˈthinkably adv
WordReference Random House Learner's Dictionary of American English © 2023
un•think•a•ble /ʌnˈθɪŋkəbəl/USA pronunciation
adj.
WordReference Random House Unabridged Dictionary of American English © 2023- so terrible as to be inconceivable:an unthinkable crime.
- not to be considered;
out of the question.
un•think•a•ble
(un thing′kə bəl),USA pronunciation adj.
n.
un′think•a•bil′i•ty, un•think′a•ble•ness, n.
un•think′a•bly, adv.
- inconceivable;
unimaginable:the unthinkable size of the universe. - not to be considered;
out of the question:Such a suggestion is unthinkable.
n.
- something that cannot be conceived or imagined, as something too unusual, vague, or disagreeable:Today's unthinkables are tomorrow's realities.
- 1400–50; late Middle English; see un-1, thinkable
un•think′a•bly, adv.
Collins Concise English Dictionary © HarperCollins Publishers::
unthinkable /ʌnˈθɪŋkəbəl/ adj
unˈthinkably adv
unˈthinkably adv
'unthinkable' also found in these entries (note: many are not synonyms or translations):