Buoyancy is the tendency of a body to rise in water. Positive buoyancy, buoyancy aid, lose buoyancy.
The force upward equals the weight of the water pushed aside, which is why a steel ship floats and a steel bar does not — the ship displaces far more. A buoyancy aid keeps a conscious swimmer up; a lifejacket turns an unconscious one face upward.
1nounbuoyancyThe tendency of a body to rise in water.
“Salt water gives you more buoyancy, so it's easier to float in the sea.”
buoyancy is a force.
From buoyant, from Spanish boyar, to float, from boya, a buoy.
Proto-Germanic
*baukną
Frankish
*baukn — beacon
Old French
boue — piece of wood or cork that floats above an anchor to indicate where it is anchored
Middle Dutch
boeye — float, buoy
Middle English
boy
English
buoy
English, today
buoyancy
Built from
From buoyant + cy or buoy + ancy. buoy comes from Middle English boy, boye, from Middle Dutch boeye (“float, buoy”), from Old French boue (“piece of wood or cork that floats above an anchor to indicate where it is anchored”) (modern French bouée), ultimately from Frankish baukn (“beacon”), from Proto-Germanic baukną. a doublet of beacon. Alternatively, and perhaps less likely (due to the unexplained shift in meaning), from Middle Dutch boeye (“shackle, fetter”), from Old French buie (“fetter, chain”), from Latin boia (“a (leather) collar, band, fetter”), from Ancient Greek βόεος, βόειος (“of ox-hide”), from βοῦς (“ox”), from Proto-Indo-European gʷṓws (“cow”). sign language was coined by Scott K. Lindell in 2003.
Etymology from Wiktionary, CC BY-SA