Word/Phrase: a su
Translation: to his/her
Pronunciation: a su
He gave it to his friend - Él se lo dio a su amigo
She took it to her house - Ella lo llevó a su casa
They are going to his party - Ellos van a su fiesta
I left it at her place - Lo dejé en su casa
Can you give it to him? - ¿Puedes dárselo a él?