The word agitated is a verb. It is the past tense of the verb agitate.
Don't agitate me!
Agitate is like when you get mad, so you could say : The kid says I agitate him.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "breezy" is an adjective.