Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unselfconsciously is an adverb meaning "in a comfortable unselfconscious manner". It carries one recorded sense.
in a comfortable unselfconscious manner
“they were naked, unshy, and unselfconsciously beautiful”
Definitions, synonyms and semantic relations for unselfconsciously come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.