Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
untarnished is an adjective meaning "(of reputation) free from blemishes". It carries one recorded sense.
(of reputation) free from blemishes
“his unsullied name”
“an untarnished reputation”
Definitions, synonyms and semantic relations for untarnished come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.