Synonyms of unanswerable in English:

unanswerable


See US English definition of unanswerable

See UK English definition of unanswerable

See Spanish definition of irrefutable

adjective

1‘an unanswerable case for investment’

SYNONYMS
irrefutable, inarguable, unarguable, indisputable, undeniable, incontestable, incontrovertible
conclusive, absolute, positive
rare irrefragable
ANTONYMS

weak, flawed

2‘it was no use pondering on unanswerable questions’

SYNONYMS
insoluble, unsolvable, insolvable, unresolvable, unexplainable, inexplicable, unascertainable
ANTONYMS

obvious