What part of speech is the word threw?

Threw is an action word. That would make it a verb. No, it is a verb. An adjective is a word that describes a noun. But "threw" is not describing anything. It is showing action. It is the irregular past tense of the verb "to throw." The girl threw the ball to her brother. Yes. Threw is the past tense of throw

I asked him to throw the ball to me.

He threw the ball so hard it hurt my hand. No, the word threw is a verb.

It is the simple past tense of throw.

Threw is a verb in the past tense.