What part of speech is under in?

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

* Preposition: This is the most common use. It shows the position of something relative to something else.

* Adverb: It can modify a verb, adjective, or another adverb, indicating location or position.

* Adjective: In rare cases, "under" can act as an adjective, meaning "lower than" or "beneath."

Here are some examples:

Preposition: The cat is under the table.

Adverb: The ball went under the fence.

Adjective: The under layer of the cake is chocolate.

Let me know if you'd like more examples!