Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unobtrusively is an adverb meaning "in an unobtrusive manner". It carries one recorded sense.
in an unobtrusive manner
“messengers were moving unobtrusively over the jet-black mountain ranges, bearing confidential tidings from sheikhdom to sheikhdom”
Definitions, synonyms and semantic relations for unobtrusively come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. .