CHOCK

n., v., & adv.

n. a block or wedge of wood to check motion, esp. of a cask or a wheel.

v.tr. 1 fit or make fast with chocks. 2 (usu. foll. by up) Brit. cram full.

adv. as closely or tightly as possible.

[ prob. f. OF çouche, çoche, of unkn. orig. ]