Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
insubstantially is an adverb meaning "not substantially; lacking substantial expression or fullness". It carries one recorded sense.
not substantially; lacking substantial expression or fullness
Definitions, synonyms and semantic relations for insubstantially come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.