What part of speech is the word quiver?

The word "quiver" can be both a noun and a verb, depending on how it's used in a sentence.

Noun: A quiver is a case for holding arrows.

*Example: The archer reached for an arrow from his quiver.*

Verb: To quiver means to tremble or shake slightly, often with fear or excitement.

*Example: Her lips quivered as she fought back tears.*