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English definition of “unthinkable”

unthinkable

adjective     /ʌnˈθɪŋ.kə.bl̩/
C1 so shocking that it cannot be imagined as possible: You can't imagine what it would be like to have your child die - it's quite unthinkable.Not believable
(Definition of unthinkable adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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