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"Her" is an adjective which is often translated as "su", and "his friend" is a phrase which is often translated as "su amigo". Learn more about the difference between "her" and "his friend" below.
her(
huhr
)An adjective is a word that describes a noun (e.g., the big dog).
1. (possessive)
a. su
Her children are very bright.Sus hijos son muy inteligentes.
I cannot stand her attitude any longer.Ya no puedo soportar más su actitud.
A pronoun is a word that stands in for a noun (e.g., she).
2. (personal)
his friend(
hihz
frehnd
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. su amigo (masculine)
Chad is coming over tonight, right? - Yes, and so is is friend.Chad viene esta noche, ¿verdad? - Sí, y también su amigo.
b. su amiga (femenine)
James is here! Wow, who is his friend? - I think it's his girlfriend.¡James ha llegado! Vaya, ¿quién es su amiga? - Creo que es su novia.