buoy"ant*ly
Webster's Dictionary (GCIDE)
Buoyant \Buoy"ant\, a. [From Buoy, v. t. & i.]
1.Having the quality of rising or floating in a fluid; tending to rise or float; as, iron is buoyant in mercury. "Buoyant on the flood." --Pope. [1913 Webster]
2.Bearing up, as a fluid; sustaining another body by being specifically heavier. [1913 Webster]
The water under me was buoyant.— Dryden.[1913 Webster]
3.Light-hearted; vivacious; cheerful; as, a buoyant disposition; buoyant spirits. -- Buoy"ant*ly, adv. [1913 Webster]