* Adjective: Describing a quality or state. Example: "The soup is thick."
* Adverb: Modifying a verb, adjective, or another adverb. Example: "The fog rolled in thick."
* Noun: Refers to a person, place, thing, or idea. Example: "He was a thick of it." (meaning he was in the middle of the action)
It's important to consider the context of the sentence to determine the part of speech.