hamstring
n
1 (Anatomy) one of the tendons at the back of the knee
Related adj →
popliteal
2 the large tendon at the back of the hock in the hind leg of a horse, etc.
vb , -strings, -stringing, -strung tr
3 to cripple by cutting the hamstring of
4 to ruin or thwart
(C16: ham1 + string)