Synonyms of unforgivable

1 Syllable
wrong
2 Syllables
unjust
3 Syllables
shameful, outrageous
4 Syllables
contemptible, disgraceful, blameworthy, deplorable, untenable, inexpiable
5 Syllables
inexcusable, indefensible, reprehensible, unjustifiable, unconscionable, criticizable, unallowable, unpardonable, unpermissible, unwarrantable