Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
lukewarmly is an adverb meaning "in an unenthusiastically lukewarm manner". It carries one recorded sense.
in an unenthusiastically lukewarm manner
“he was lukewarmly received by his relatives”
Definitions, synonyms and semantic relations for lukewarmly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.