vs
QUICK ANSWER
"What is" is a phrase which is often translated as "qué es", and "her" is an adjective which is often translated as "su". Learn more about the difference between "what is" and "her" below.
what is(
wuht
ihz
)A phrase is a group of words commonly used together (e.g., once upon a time).
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)
