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"Niña" is a form of "niña", a noun which is often translated as "girl". "Mujer" is a noun which is often translated as "woman". Learn more about the difference between "niña" and "mujer" below.
la niña(
nee
-
nyah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. pupil
Tenía que llevar gafas de sol con las niñas dilatadas.He had to wear sunglasses while his pupils were dilated.
la mujer(
moo
-
hehr
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. no direct translation
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
¡Mujer, pero si era broma! ¿Creíste que lo decía en serio? - Pues sí.But it was a joke! Did you think I was being serious? - Well, yes, I did.
¡Mujer, no te enfades! Lo hice sin mala intención.Come on, don't be angry! I meant no harm.