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"Una" is a form of "una", a noun which is often translated as "one". "Restaurante" is a noun which is often translated as "restaurant". Learn more about the difference between "una" and "restaurante" below.
la una(
oo
-
nah
)
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
feminine noun
a. one
Es la una de la tarde.It's one in the afternoon.
b. one o'clock
Tengo una cita a la una.I have an appointment at one o'clock.
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el restaurante(
rrehs
-
tow
-
rahn
-
teh
)
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
masculine noun
a. restaurant
El nuevo restaurante mexicano en nuestro vecindario está riquísimo.The new Mexican restaurant in our neighborhood is really tasty.
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