Meaning

noun a block of wood used to prevent the sliding or rolling of a heavy object

verb secure with chocks

verb support on chocks

originFrom Middle English *chokke (possibly attested in Middle English chokkefull), from Anglo-Norman choque (compare modern Norman chouque), from an Old Northern French variant of Old French çouche, çouche (“block, log”), of Celtic origin, from Gaulish *tsukka (compare Breton soc’h (“thick”), Old Irish tócht (“part, piece”), itself borrowed from Proto-Germanic *stukkaz. Doublet of stock.

Etymology from Wiktionary, CC BY-SA 3.0