Assuming "hunts" is a verb:

"Hunts" is the third person simple present of "hunt". In the dragon language, verbs do not conjugate for person, so the third person of nir 'hunt' is nir. The full conjugation table goes as follows:

I hunt - zu'u nir
you hunt - hi nir
he/she hunts - rok nir
it hunts - nii nir
we hunt - mu nir
they hunt - nust nir

Assuming "hunts" is a noun:

The explicit plural of nir 'hunt' is nirre. The base form nir can also be interpreted as a plural based on context. Give the full sentence for context next time.