posterior
🇺🇸
/pɑːˈstɪriər/
🇬🇧
/pɒˈstɪəriə(r)/
situated at the back or towards the back
The posterior wall of the room had a large window.
房间的后墙有一扇大窗户。
the backside or buttocks
She gave him a gentle pat on the posterior.
她轻轻地拍了拍他的臀部。