buttocks

US /ˈbʌt.əks/
UK /ˈbʌt.əks/
"buttocks" picture
1.

臀部, 屁股

the two rounded fleshy parts of the human body that form the rear part of the trunk

:
She landed hard on her buttocks.
她重重地摔在了臀部
The doctor examined the patient's buttocks.
醫生檢查了病人的臀部