buoyancy

Buoyancy is a quality that makes things float in water. It's also a type of happiness: if you're full of buoyancy, your mood is light and happy.

This is a word with two main meanings that fit together well: Both kinds of buoyancy have to do with floating and staying up. The physical kind refers to objects that float instead of sinking in water, like a life raft or a buoy. The other kind of buoyancy is a happy mood, a feeling that nothing can get you down. So whenever you run into the word buoyancy, just think "staying afloat."

Primary Meanings of buoyancy

1.
n
the tendency to float in water or other liquid
2.
n
cheerfulness that bubbles to the surface
Full Definitions of buoyancy
1

n the tendency to float in water or other liquid

Type of:
inclination, tendency
a characteristic likelihood of or natural disposition toward a certain condition or character or effect

n the property of something weightless and insubstantial

Synonyms:
airiness
Type of:
lightness, weightlessness
the property of being comparatively small in weight
2

n cheerfulness that bubbles to the surface

Synonyms:
perkiness
Type of:
blitheness, cheerfulness
a feeling of spontaneous good spirits

n irrepressible liveliness and good spirit

“I admired his buoyancy and persistent good humor”
Synonyms:
irrepressibility
Type of:
life, liveliness, spirit, sprightliness
animation and energy in action or expression

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