Buoyancy

Part of speech: noun

Pronunciation: /ˈbɔɪ.ən.si/

Definitions

1. The upward force exerted by a fluid that allows objects to float or rise, or the capacity to remain resilient and optimistic despite challenges
2. An object's tendency to stay afloat in liquid or air due to displacement forces, combined with the ability to recover quickly from adversity
3. The property that enables an object to stay on or rise above the surface of a liquid or gas due to upward force ; the characteristic of maintaining a positive and hopeful attitude despite difficulties

Etymology: The noun "buoyancy" sits on top of a word that is itself a noun in disguise. "Buoy" entered English from Old French "boie" (a chain or fetter), a sense that survives only in the idea of an anchored float, not in the float's modern role as a sea marker. The link to floating came from the object's job of holding up above the water, and the older sense of restraint faded as the floating sense took over. The word is built from "buoyant" with the suffix "-cy", or possibly from "buoy" with "-ancy", and both routes lead to the same sense: the capacity to rise and stay afloat. The "buoy" route is the more transparent one, since "buoyant" is the adjective describing something that rises or floats easily, and "-ancy" is a common English suffix for abstract qualities of a state or condition. Between them, the noun names the property itself rather than the object or the action.

Synonyms: floatability, lightness

Antonyms: heaviness, submergence