buttocks

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

fesses, derrière

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

:
She landed hard on her buttocks.
Elle a atterri durement sur ses fesses.
The doctor examined the patient's buttocks.
Le médecin a examiné les fesses du patient.