son dos
He sank the knife into her back.
Il lui enfonça le couteau dans le dos.
She keeps her back to the camera.
Elle tourne le dos à la caméra.
— State and Main (2000)
She turned her back on Tom.
Elle a tourné le dos à Tom.
She was carrying that baby on her back.
Elle portait ce bébé sur son dos.
She turned her back on me.
Elle m'a tourné le dos.
She patted her back.
Elle lui tapota le dos.
She is carrying a pack on her back.
Elle porte un sac à dos.
Behind her back, certainly.
Dans son dos, certainement.
— Office Romance (1977)
Put it down her back.
Posez-le dans son dos.
— Amarcord (1973)