Main Entry: un·think·able

Pronunciation: \-ˈthiŋ-kə-bəl\

Function: adjective

Date: 15th century

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