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"Arena" is a form of "arena", a noun which is often translated as "sand". "Piedras" is a form of "piedra", a noun which is often translated as "stone". Learn more about the difference between "arena" and "piedras" below.
la arena(
ah
-
reh
-
nah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
2. (stadium)
a. arena
Nuestro equipo de basquetbol juega en una arena de nivel profesional.Our basketball team plays in a professional arena.
b. bullring (bullfighting)
El torero saludó al público que estaba sentado en la arena.The bullfighter greeted the audience that was seated in the arena.
las arenas
A plural noun indicates that there is more than one person, place, thing, or idea.
3. (medicine)
a. stones
Sr. García, hay que hacer cita para sacarle las arenas de la vejiga.Mr. Garcia, we need to make an appointment to remove the stones from your bladder.
la piedra(
pyeh
-
drah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
2. (piece)
b. rock (United States)
Regionalism used in the United States
La playa a la que fuimos estaba llena de piedras.The beach we went to was full of rocks.
3. (medicine)
a. flint
La piedra del mechero está bien pero falta fluido.The flint of the lighter is fine but there's no fluid.
