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Vinony

buoyancy

noun

  1. upward force that opposes the weight of an object immersed in fluid
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Wiktionary

Pronunciation: /ˈbɔɪ.ən.si/

noun

Etymology: From buoyant + -cy or buoy + -ancy.

  1. The upward force on a body immersed or partly immersed in a fluid.
  2. The ability of an object to stay afloat in a fluid.
  3. Resilience or cheerfulness.

    “With how much lighter a step, with how much brighter an eye, did Francesca wander through the forest, even in the last desolation of autumn, than she did in all the bloom and buoyancy of spring!”