BUOYANT

buoyant. Buoyant, a. that will not sink, floating, light

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Buoy″ant (�), a. [[From Buoy, v. t. & i.]] 1. 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.
2. 2. Bearing up, as a fluid; sustaining another body by being specifically heavier.
The water under me was buoyant. Dryden. 3. 3. Light-hearted; vivacious; cheerful; as, a buoyant disposition; buoyant spirits. — Buoy″ant‐ly, adv.