What is the part of speech for smooth?

"Smooth" can be several parts of speech depending on how it's used in a sentence:

* Adjective: Describes a noun. Example: "The surface of the table is smooth."

* Verb: Means to make something smooth. Example: "She smoothed the wrinkles out of her dress."

* Adverb: Modifies a verb, adjective, or another adverb. Example: "The car drove smoothly down the road."

To determine the part of speech, you need to consider the context of the sentence.