Is Muddy a Verb or Noun?

Muddy is a verb that means to make dirty with mud.

What is noun of muddy?

muddiness. The characteristic of being muddy.

Is the word mud a verb?

verb (used with object), mud·ded, mud·ding. to cover, smear, or spatter with mud: to mud the walls of a hut. to stir up the mud or sediment in: waders mudding the clear water. verb (used without object), mud·ded, mud·ding.