Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unregretful is an adjective meaning "feeling no regret". It carries one recorded sense.
feeling no regret
“was completely unregretful about what had happened”
Definitions, synonyms and semantic relations for unregretful come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.