What part of speech is quiver?

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

* Noun: A case for arrows (e.g., "The archer reached for his quiver.")

* Verb: To tremble or shake (e.g., "Her lips quivered with fear.")

Let me know if you have a specific sentence in mind, and I can tell you which part of speech it is in that instance!