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