adjective
1.
Synonyms: exceptional 1, extraordinary, rare, singular, uncommon, unimaginable, unique, unordinary, unusual, unwonted
2.
Synonyms: incredible 1, incogitable, inconceivable, insupposable, unbelievable, unimaginable
Antonyms: thinkable
UNTHINKABLE
Meaning of UNTHINKABLE in English
Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003