Synonyms of unforgivable in English:

unforgivable


See definition of unforgivable

adjective

1‘he had committed the unforgivable sin—he had informed on his friends’

SYNONYMS

inexcusable, unpardonable, unjustifiable, indefensible, reprehensible, outrageous, deplorable, insupportable, despicable, contemptible, disgraceful, shameful

inexpiable, irremissible, unwarrantable, condemnable

mortal, deadly

ANTONYMS

forgivable, unserious, venial