buoyant

Something that is buoyant floats in water. Since floating is happier than sinking, buoyant also refers to things are fun and upbeat.

Someone with a buoyant personality is fun to be around, laughs a lot, smiles, and cheers other people up. Buoyant people are lively and lighthearted — the opposite of sad, depressed, and bummed out. Buoyant people are also called bubbly and cheerful, and it should help to remember that buoyant objects float — just like a buoyant person can seem like they're floating too (as in the expression "floating on air").

Definitions of buoyant
1

adj tending to float on a liquid or rise in air or gas

buoyant balloons”
buoyant balsawood boats”
Synonyms:
floaty
light
of comparatively little physical weight or density

adj characterized by liveliness and lightheartedness

buoyant spirits”
Synonyms:
chirpy, perky
cheerful
being full of or promoting cheer; having or showing good spirits

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