Is the word yes an interjection?

It's a bit tricky! "Yes" can be classified as an interjection in some contexts, but it's more accurately described as an affirmative word.

Here's why:

* Interjection: Interjections are words or phrases that express strong emotion or a sudden outburst. "Yes" can be used this way:

* "Yes! I won the lottery!"

* "Yes, that's right!"

* Affirmative word: "Yes" is primarily used to express agreement or affirmation. It functions more like a response or a statement, rather than a standalone expression of emotion.

In short: While "yes" can sometimes act like an interjection, its primary function is as an affirmative word.