mules is a form of:

Mule



1.
(COLLOQUIAL) He's a mule មនុស្សក្បាលរឹង
noun
1.
(an animal that is the offspring of a horse and a donkey, a machine that spins cotton fibers into yarn) សេះទេសឈ្មោល, សេះទេសញី, buy a mule សេះទេស
ENGLISH MEANING
noun
1.
A hybrid animal; specifically, one generated between an ass and a mare, sometimes a horse and a she-ass.
2.
A plant or vegetable produced by impregnating the pistil of one species with the pollen or fecundating dust of another; -- called also hybrid.
3.
A very stubborn person.
4.
A machine, used in factories, for spinning cotton, wool, etc., into yarn or thread and winding it into cops; -- called also jenny and mule-jenny.