What part of speech is brisk?

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

* Adjective: Describing something that is quick and energetic.

* Example: "She took a brisk walk in the park."

* Adverb: Describing a verb, meaning quickly and energetically.

* Example: "He walked briskly towards the door."

So, the part of speech depends on how it's used in a sentence!