buoyancy

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Noun[change]

Singular
buoyancy

Plural
none

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The Simple English Wikipedia has an article on:
buoyancy
  1. (physics) Buoyancy is the force pushing up on a body in a fluid.
    Wood floats in water because of buoyancy.
  2. (by extension) Resilience or cheerfulness.
    I am happy with your buoyancy after many bad things happened to you.

Related words[change]