Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
entreatingly is an adverb meaning "in a beseeching manner". It carries one recorded sense.
in a beseeching manner
“`You must help me,' she said imploringly”
Definitions, synonyms and semantic relations for entreatingly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.