thresh
/θreʃ/verb
with obj.
1
- separate grain from (corn or other crops), typically with a flail or by the action of a revolving mechanism摔打（谷或其他庄稼）使脱粒：
machinery that can reap and thresh corn in the same process
可同时收割和打谷的机器
as noun threshing farm workers started the afternoon's threshing.农场工人们开始了下午的打谷。
1.1
thresh something over
analyse a problem in search of a solution反复研究; 推敲。
词源
Old English therscan, later threscan, of Germanic origin; related to Dutch dorsen and German dreschen. Compare with THRASH.