[with obj.](archaic)take off or lower (one's hat or crown) as a token of respect or submission (古)(表示敬意或順從)放(或脫)下(帽,冠) ■[no obj.]take off one's hat or otherwise show respect or submission to someone 脫帽致敬
語(yǔ)源
Middle English (originally in the sense 'lower (one's eyes, weapon, banner, etc.) as a sign of submission'): shortening of obsolete avale, from Old French avaler 'to lower', from a val 'down' (literally 'in the valley')