thrash
verb uk/θræʃ/ us/θræʃ/
(HIT)
[ T ]（作为惩罚）毒打，痛打
to hit a person or animal hard many times as a punishment
His father used to thrash him when he was a boy. 他小时候，父亲常常责打他。
He thrashed the horse with his whip. 他用鞭子狠狠抽打这匹马。
(MOVE)
[ I ]猛烈摆动;剧烈扭动;翻腾
to move from side to side in a violent or uncontrolled way
He was screaming and thrashing around on the floor. 他大喊大叫，在地板上滚来滚去。
(DEFEAT)
[ T ] informal（比赛中）彻底击败
to defeat someone very easily in a game or sports competition
We thrashed the visiting team 6–0. 我们以6比0大败客队。
(REMOVE SEEDS)
[ I or T ]打谷;脱粒（同 thresh）
to thresh
Phrasal verb
thrash something out 彻底讨论（直到找到解决办法）;通过反复商讨解决
to discuss a problem in detail until you reach an agreement or find a solution
If we have an important decision to make, we sometimes spend a whole day thrashing it out in a meeting. 当我们要作重大决策时，有时会开一整天的会来商定。