Dictionary

unthinkable

unthinkable

adjective un·think·able \-ˈthiŋ-kə-bəl\

: impossible to imagine or believe : too bad or shocking to be thought of

Full Definition of UNTHINKABLE

1
:  not capable of being grasped by the mind
2
:  being contrary to what is reasonable, desirable, or probable :  being out of the question
un·think·abil·i·ty \ˌən-ˌthiŋ-kə-ˈbi-lə-tē\ noun
un·think·ably \ˌən-ˈthiŋ-kə-blē\ adverb

Examples of UNTHINKABLE

  1. <to most people it seemed unthinkable that such a gentle man could be guilty of such awful crimes>

First Known Use of UNTHINKABLE

15th century

Rhymes with UNTHINKABLE

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