What part of speech is careful?

"Careful" can be multiple parts of speech, depending on its use in a sentence:

* Adjective: Describing a noun. Example: "She is a careful driver."

* Adverb: Modifying a verb, adjective, or another adverb. Example: "He carefully checked his work."

Let me know if you have a specific sentence in mind and I can help determine the part of speech of "careful" in that context!