* Adjective: Describing something that has no limit or end.
* Example: "The universe is infinite."
* Noun: Referring to something that is limitless or boundless.
* Example: "The possibilities are infinite."
* Pronoun: Referring to something already mentioned and understood to be limitless.
* Example: "The universe is vast, and the possibilities are infinite."
Let me know if you have a specific sentence in mind and I can help determine the part of speech.