hindquarters
US /ˌhaɪndˈkwɔːr.t̬ɚz/
UK /ˌhaɪndˈkwɔːr.t̬ɚz/

1.
arrière-train, croupe
the hind legs and the adjoining part of the body of a quadruped
:
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The horse's powerful hindquarters propelled it over the jump.
Les puissants arrière-trains du cheval le propulsèrent par-dessus l'obstacle.
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The dog wagged its tail, making its entire hindquarters wiggle.
Le chien remua la queue, faisant gigoter tout son arrière-train.