sprag

/ˈspɹæɡ/

Etymology

See spray (“a branch”).

sprag means A billet of wood; a piece of timber, a similar solid object or constructed unit used as a prop. Lexicurio rates it Sui generis — a strength score of 85 out of 100.

noun

A billet of wood; a piece of timber, a similar solid object or constructed unit used as a prop.“1956, United States Department of the Army, United States Department of the Air Force, Principles of Automotive Vehicles, Technical Manual 9-8000, page 325, A sprag (fig. 349) is a steel block so shaped as to act as a wedge in the complete assembly. In the sprag unit under discussion, there are 42 sprags assembled into an outer race and held in place by two energizing springs (fig. 350).”

verb

To check the motion of, as a carriage on a steep slope, by putting a sprag between the spokes of the wheel.“Accidents happen to the driver while running alongside his trip, spragging wheels or applying brakes”
To prop or sustain with a sprag.