best friend
US /ˌbest ˈfrend/
UK /ˌbest ˈfrend/

1.
sahabat, teman terbaik
a person's closest friend
:
•
She told her best friend everything.
Dia menceritakan semuanya kepada sahabatnya.
•
He and his best friend have known each other since childhood.
Dia dan sahabatnya sudah saling kenal sejak kecil.