buoy ‧ ant /ˈbɔɪənt $ ˈbɔɪənt, ˈbuːjənt/ BrE AmE adjective
[ Date: 1500-1600 ; Language: Spanish ; Origin: boyante , from boyar ; ⇨ ↑ buoy 2 ]
1 . happy and confident:
Phil was in a buoyant mood.
2 . buoyant prices etc tend to rise:
a buoyant economy
3 . able to float or keep things floating:
Cork is very buoyant.
—buoyantly adverb