Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
untruly is an adverb meaning "in a untrue manner". It carries one recorded sense.
in a untrue manner
“he silenced the whisperings which connected her, untruly and unfairly, with his separation from his wife”
Definitions, synonyms and semantic relations for untruly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.