Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
questionably is an adverb meaning "in a questionable and dubious manner". It carries one recorded sense.
in a questionable and dubious manner
“these were estates his father questionably acquired”
Definitions, synonyms and semantic relations for questionably come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. .