Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
gloatingly is an adverb meaning "in a gloating manner". It carries one recorded sense.
in a gloating manner
“he spoke gloatingly about people he had cheated out of their money”
Definitions, synonyms and semantic relations for gloatingly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.