buoy·ant 
/ˈbojənt/ adjective
/ˈbojənt/ adjective [more buoyant; most buoyant] 1 a : able to float
▪ Cork is very buoyant. ▪ a buoyant material
b : able to cause things to float
▪ Warm air is more buoyant than cool air. 2 : happy and confident
▪ The actors were buoyant as they prepared for the evening's performance. ▪ in a buoyant mood 3 : able to stay at a regular or high level
▪ a buoyant economy/market
▪ Cork is very buoyant. ▪ a buoyant material
b : able to cause things to float
▪ Warm air is more buoyant than cool air.
▪ The actors were buoyant as they prepared for the evening's performance. ▪ in a buoyant mood
▪ a buoyant economy/market
— buoy·ant·ly adverb
▪ buoyantly cheerful/confident
▪ buoyantly cheerful/confident
