Sprain /(sprān)/

Sprain

v. t.

imp. & p. p. Sprained; p. pr. & vb. n. Spraining

  1. 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.

Sprain

n.
  1. The act or result of spraining; lameness caused by spraining; as, a bad sprain of the wrist.

Phrases & Compounds
Sprain fracture
the separation of a tendon from its point of insertion, with the detachment of a shell of bone to which the tendon is attached.