Webster's Revised Unabridged Dictionary · 1913

Protrude

Protrude , transitive verb

[Latin protrudere, protrusum; pro forward + trudere to thrust. See Threat.]

1.
To thrust forward; to drive or force along. — Locke
2.
To thrust out, as through a narrow orifice or from confinement; to cause to come forth.
When... Spring protrudes the bursting gems. — Thomson

Protrude , intransitive verb

To shoot out or forth; to be thrust forward; to extend beyond a limit; to project.
The parts protrude beyond the skin. — Bacon