buoy /boi (in N Am often booˈē and in derivatives below booˈy-)/

A floating secured mark, serving (by its shape, colour, light, sound, etc) as a guide or as a warning

1. To provide or mark with buoys or marks
2. To keep afloat, bear up, or sustain (usu with up)
3. To raise, lift (the spirits, etc; usu with up)

To rise

buoyˈage noun

1. A series of buoys or floating beacons to mark the course for vessels
2. The provision, or system, of buoys

buoyˈance (rare) or buoyˈancy noun

1. The capacity for floating or causing to float lightly on water or in the air
2. Loss of weight owing to immersion in a fluid
3. Lightness of spirit, cheerfulness, resilience

buoyˈant adjective

1. Tending to float or to buoy up
2. (of spirits, etc) light, cheerful and resilient
3. (of share prices, sales, profits, etc) tending to rise
4. (of a firm) with rising profits, etc

buoyˈantness noun

buoyancy aid noun

An inflated support for esp children learning to swim

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