Is protrude a noun or verb?

"Protrude" is primarily a verb. It means to stick out or extend beyond something.

Here are some examples:

* Verb: His tongue protruded from his mouth.

* Verb: The roof of the car protruded into the street.

However, there is also a noun form of "protrude," which is protrusion. It refers to the act of protruding or the part that sticks out.

Here are some examples:

* Noun: The protrusion of the rock made it difficult to climb.

* Noun: The doctor examined the protrusion on his arm.