rears is a form of:

Pastern



noun
1.
(វេជ្ជសាស្ត្រ) ច្រវែកជើងសេះ
ENGLISH MEANING
noun
1.
The part of the foot of the horse, and allied animals, between the fetlock and the coffin joint.
2.
A shackle for horses while pasturing.
1.
A patten