Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
incautiously is an adverb meaning "without caution or prudence". It carries one recorded sense.
without caution or prudence
“one unfortunately sees historic features carelessly lost when estates fall into unsympathetic hands”
Definitions, synonyms and semantic relations for incautiously come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.