Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
blamelessly is an adverb meaning "in an irreproachable and blameless manner". It carries one recorded sense.
in an irreproachable and blameless manner
“she had lived blamelessly until she met this man”
Definitions, synonyms and semantic relations for blamelessly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. .