- unforgivable
- adjinexcusable, unpardonable, uncondonable, irremissible, unexpiable, unatonable, inexonerable; unwarrantable, unjustifiable, unvin-dicable, unexculpable; indefensible, undefendable, untenable; reprehensible, deplorable, contemptible, despicable, condemnable, censurable, blameworthy; outrageous, scandalous, shameful, disgraceful, ignoble, vile, abject, low; heinous, grievous, ghastly, horrible, terrible, awful, atrocious, abominable, abhorrent, odious, Brit. beastly.
A Note on the Style of the synonym finder. 2014.