How to Say "to buoy" in Spanish
The Spanish word for “to buoy” is “flotar” — A2 level. This is a very common word in everyday Spanish.

Examples
La madera flota en el agua.
Wood floats on water.
Aprendí a flotar de espaldas en la piscina.
I learned to float on my back in the pool.
Hay mucho aceite flotando en la sopa.
There is a lot of oil floating in the soup.
A Friendly Regular Verb
Flotar follows the standard pattern for '-ar' verbs. It doesn't have any hidden spelling changes or irregular forms.
Which Word for 'On'?
Even though English says 'float ON water', Spanish usually uses 'en' (in/on). Use 'La madera flota en el agua'.
Float vs. Swim
Mistake: “Usar 'flotar' para referirse a avanzar en el agua.”
Correction: Use 'nadar' if you are moving/swimming. Use 'flotar' only if you are staying still on the surface.
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