Inexcusable
Part of speech: adjective
Definition: not excusable
Unforgivable
Part of speech: adjective
Definition: Not forgivable
Inexcusable as an adjective is not excusable while Unforgivable as an adjective is not forgivable
Part of speech: adjective
Definition: not excusable
Part of speech: adjective
Definition: Not forgivable
We hope you now know whether to use Inexcusable or Unforgivable in your sentence.