SPRAG (3)

Sprag, v. t. [imp. & p. p. Spragged (sprăgd); p. pr. & vb. n. Spragging (–gĭng).] 1. 1. To check the motion of, as a carriage on a steep grade, by putting a sprag between the spokes of the wheel. R. S. Poole.
2. 2. To prop or sustain with a sprag.