Sprain

Part of speech: noun (n.)

The act or result of spraining; lameness caused by spraining; as, a bad sprain of the wrist. Sprain fracture (Med.), the separation of a tendon from its point of insertion, with the detachment of a shell of bone to which the tendon is attached.

Part of speech: verb (v.)

To weaken, as a joint, ligament, or muscle, by sudden and excessive exertion, as by wrenching; to overstrain, or stretch injuriously, but without luxation; as, to sprain one's ankle.