adjective Date: 15th century not capable of being grasped by the mind, being contrary to what is reasonable, desirable, or probable ; being out of the question, unthinkability noun unthinkably adverb
UNTHINKABLE
Meaning of UNTHINKABLE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012