buoyancy

noun
UK /ˈbɔɪ.ən.si/
US /ˈbɔɪ.ən.si/

Buoyancy is the push that makes things float in water.

The beach ball's buoyancy kept it bobbing on the waves.


OTHER MEANINGS

2. A cheerful and hopeful feeling.

Her buoyancy lifted everyone's spirits at the party.

3. The ability of a price or market to stay high or recover quickly.

The buoyancy of the housing market surprised the experts.

4. The power of a liquid or gas to keep an object afloat.

Salt water has more buoyancy than fresh water.