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"Una" is a form of "una", a noun which is often translated as "one". "Cuarenta" is an adjective which is often translated as "forty". Learn more about the difference between "una" and "cuarenta" 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)
cuarenta(
kwah
-
rehn
-
tah
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
