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"Una" is a form of "una", a noun which is often translated as "one". "Andrés" is a proper noun which is often translated as "Andrew". Learn more about the difference between "una" and "Andrés" 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).
1. (time)