What part of speech is excuse?

"Excuse" can be a few different parts of speech, depending on how it's used in a sentence:

* Noun: This is the most common usage. It refers to a reason or explanation given for something wrong or inappropriate.

* Verb: It can be used as a verb meaning "to pardon" or "to forgive."

* Interjection: It can be used as an interjection, meaning "pardon me" or "I beg your pardon."

Here are some examples:

Noun: "His excuse for being late was unconvincing."

Verb: "Please excuse me for interrupting."

Interjection: "Excuse me, do you know the time?"