Syllable division and stress derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
overweening is an adjective meaning "unrestrained, especially with regard to feelings". It carries 2 recorded senses.
unrestrained, especially with regard to feelings
“extravagant praise”
“exuberant compliments”
“overweening ambition”
“overweening greed”
presumptuously arrogant
“had a witty but overweening manner”
“no idea how overweening he would be”
“getting a little uppity and needed to be slapped down”
Definitions, synonyms and semantic relations for overweening come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.