Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
insinuatingly is an adverb meaning "in an insinuating manner". It carries one recorded sense.
in an insinuating manner
“the art book has art to sell, insinuatingly, and for a purpose, like the American muse, which has in fact a tradition to sell, and one which doesn't exist, in painting”
Definitions, synonyms and semantic relations for insinuatingly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.