o ‧ ver ‧ ween ‧ ing /ˌəʊvəˈwiːnɪŋ◂ $ ˌoʊvər-/ BrE AmE adjective formal
[ Date: 1300-1400 ; Origin: overween 'to be too confident' (14-19 centuries) , from ween 'to think, believe' (11-20 centuries) , from Old English wenan ]
too proud and confident – used to show disapproval SYN arrogant :
overweening ambition
—overweeningly adverb