flail

n. threshing tool made of two sticks joined by aleather thong连枷。
△3H.VI.2.1.130:“Our soldiers.like the night-owl's lazy flight,/ Or like an idle thres-her with a flail,/ Fell gently down,as if they strucktheir friends.”我方的将士，就像夜枭的懒洋洋飞行，或者像手拿连枷懒懒打谷的人，轻轻地砍下去，仿佛打的是自家的朋友。

flail[fleil]

n. 扫雪装置
‖ flail tank 扫雷坦克