impenitent
[adjective]
Synonyms: remorseless, regretless, uncontrite, unregretful, unremorseful, unrepentant, unsorry

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Antonyms: penitent

[TahlilGaran] English Synonym Dictionary ▲

impenitent adjective

1. not feeling ashamed or sorry about something bad you have done
   Word Originlate Middle English: from ecclesiastical Latin impaenitent- ‘not repenting’, from Latin in- ‘not’ + paenitere ‘repent’.

[TahlilGaran] English Dictionary ▲