to surrender someone or something to another; "the guard delivered the criminal to the police"; "render up the prisoners"; "render the town to the enemy"; "fork over the money"
characterized by liveliness and lightheartedness; "buoyant spirits"; "his quick wit and chirpy humor"; "looking bright and well and chirpy"; "a perky little widow in her 70s"
tending to float on a liquid or rise in air or gas; "buoyant balloons"; "buoyant balsawood boats"; "a floaty scarf"