noun
part of the body where the foot is connected to the leg
he twisted his ankle or he sprained his ankle = he hurt it by stretching it or bending it
anklebone or talus = bone which is part of the tarsus and links the bones of the lower leg to the calcaneus
ankle fracture = break in any of the bones in the ankle
ankle jerk = sudden jerk as a reflex action of the foot when the back of the ankle is tapped
ankle joint = joint which connects the bones of the lower leg (the tibia and fibula) to the talus