vs
QUICK ANSWER
"Her" is an adjective which is often translated as "su", and "your" is an adjective which is often translated as "tu". Learn more about the difference between "her" and "your" 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)
your(
yor
)An adjective is a word that describes a noun (e.g., the big dog).
a. tu (informal) (singular)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
Did you find your wallet?¿Encontraste tu cartera?
Don't forget to pick up your bags once we land.No te olvides de recoger tus maletas cuando aterricemos.
b. su (formal) (singular)
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
Would you like me to pick up your children from school, sir?¿Quiere que recoja a sus hijos de la escuela, señor?
3. (impersonal)
a. no direct translation
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
Sleeping eight hours a day is good for your health.Dormir ocho horas cada noche es bueno para la salud.
Too much television is bad for your eyes.Ver mucha televisión es malo para la vista.