unforgivable

Definitions

So bad or offensive that it cannot be forgiven or excused.

Impossible to justify or overlook.

Examples

Betraying the trust of a lifelong friend is truly unforgivable.

The politician's unforgivable remarks caused a massive public outcry.

Synonyms

inexcusable unpardonable indefensible unjustifiable intolerable reprehensible

Antonyms

forgivable pardonable excusable justifiable understandable venial