Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
disinterestedly is an adverb meaning "without bias; without selfish motives". It carries one recorded sense.
without bias; without selfish motives
“he decided the case disinterestedly”
Definitions, synonyms and semantic relations for disinterestedly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.