flails
v.
鞭打( flail的第三人称单数 );
用连枷脱粒;
（臂或腿）无法控制地乱动;
扫雷坦克;
例句:
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Other tanks were equipped with rotating flails to clear minefields.
来自BBC
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The son silently took a flail and they began threshing with four flails.
儿子也开始悄悄乘枷脱粒四枷.
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His skinny leg sticks out the side and flails helplessly.
来自SA
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My wife nods, the wet ropes of her hair beating at her shoulders like the flails of the penitents.
来自NEWYORKER