Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
jestingly is an adverb meaning "in jest". It carries one recorded sense.
in jest
“I asked him jokingly whether he thought he could drive the Calcutta-Peshawar express”
Definitions, synonyms and semantic relations for jestingly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.