* Adjective: This is the most common usage. It describes something or someone having the power to influence others.
* Example: "She was an influential figure in the movement."
* Noun: It can describe someone or something that has influence.
* Example: "The book was a major influential in my life."
* Verb: While less common, it can act as a verb meaning "to influence."
* Example: "The speaker's words influential the audience to think differently."
It's important to look at the context of the sentence to determine the correct part of speech.