What part of speech is the word deep?

The word "deep" can be several parts of speech, depending on its use in a sentence:

* Adjective: Describing a quality or characteristic. Example: "The ocean is very deep."

* Adverb: Modifying a verb, adjective, or another adverb. Example: "He slept deeply."

* Noun: Referring to the depth of something. Example: "The diver reached the deep of the ocean."

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