late Middle English (in the sense 'watertight'): from Old French estanche, feminine of estanc, from a Romance base meaning 'dried up, weary'. Sense 1 dates from the early 17th cent
[with obj.]stop or restrict (a flow of blood) from a wound 止(血),制止(出血) he staunched the blood with whatever came to hand. 他用手边的任何东西来止血。 the company did nothing to stanch the tide of rumours. 那个公司听任流言传播。 ■stop the flow of blood from (a wound) 给(伤口)止血
语源
Middle English: from Old French estanchier, from the base of staunch