heirs is a form of:

Mare



noun
1.
(the female of a horse or related animal) សេះលាញី
  • mare liberum
    - ផ្លូវទឹកអន្តរជាតិ (សម្រាប់នាវាចរណ៍)
  • mare nostrum
    - ផ្លូវទឹកសម្រាប់នាវាចរណ៍ (សម្រាប់ប្រើរវាងប្រទេសមួយ ឬ ពីរ)
ENGLISH MEANING
noun
1.
The female of the horse and other equine quadrupeds.
2.
Sighing, suffocative panting, intercepted utterance, with a sense of pressure across the chest, occurring during sleep; the incubus; -- obsolete, except in the compound nightmare.