tenterhooks: [15] A tenterhook is one of a set of hooks used to hold cloth taut on a frame during manufacture, especially while its dries (tenter comes from medieval Latin tentorium, a derivative of Latin tendere ‘stretch’). The metaphorical use of on tenterhooks to mean ‘in a state of agonizing suspense’ dates from the mid- 18th century. [tenterhooks etymology, tenterhooks origin, 英语词源]