Meaning & Definition
adjective
Not able to be forgiven; inexcusable.
His betrayal was unforgivable, leaving her heartbroken and furious.
Too serious or severe to be excused or pardoned.
The company's careless handling of sensitive data was an unforgivable mistake.
Deserving no forgiveness or excuse.
To break that promise was an unforgivable offense in their relationship.
Etymology
From un- 'not' + forgivable.
Common Phrases and Expressions
unforgivable sin:
A transgression that is considered too serious to be forgiven.
unforgivable mistake:
An error that is deemed too severe to be excused.
Slang Meanings
Completely unacceptable.
Missing the deadline again? That's unforgivable.
So bad it can't be overlooked.
Cheating in a game? That's just unforgivable, man.