buoyant

/ˈbɔɪɪnt/

/ˈbɔɪənt/

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. adjective

   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
2. adjective

   characterized by liveliness and lightheartedness
   “buoyant spirits”

   synonyms: chirpy, perky

   cheerful

   being full of or promoting cheer; having or showing good spirits