One who idles; one who spends his or her time in inaction.
One who idles; a lazy person; a sluggard.
A mechanical device such as a pulley or wheel that does not transmit power, but supports a moving belt etc.
A person who shows initiative and resourcefulness.
A mechanism (usually one operated by electricity, compressed air, a spring, or an explosive gas), attached to an internal-combustion engine, as on an automobile, and used as a means of starting the engine without cranking it by hand.