名詞 buoyancy:

1. cheerfulness that bubbles to the surface
   同義詞：perkiness
2. the property of something weightless and insubstantial
   同義詞：airiness
3. the tendency to float in water or other liquid
4. irrepressible liveliness and good spirit
   同義詞：irrepressibility

buoy.an.cy

n.（名詞）

The tendency or capacity to remain afloat in a liquid or rise in air or gas.
浮性：在液體中保持漂浮狀態(tài)或在空氣或氣體中保持懸浮狀態(tài)的趨勢或能力
The upward force that a fluid exerts on an object less dense than itself.
浮力：流體施加給比自己密度小的物體的向上作用的力
Ability to recover quickly from setbacks; resilience.
彈性：從受阻狀態(tài)下很快恢復的能力；彈性
Lightness of spirit; cheerfulness.
輕快，快樂；高興