来自PIE*kenk,膝弯,脚跟,词源同heel.
hock 典当,抵押来自荷兰语hok,监狱,围栏,狗舍。引申词义欠债,后用于指典当,抵押。
When one gambler is caught by another, smarter than himself, and is beat, then he is in hock. Men are only caught, or put in hock, on the race-tracks, or on the steamboats down South. ... Among thieves a man is in hock when he is in prison. [G.W. Matsell, "Vocabulum," 1859]