1. 打：threnody 悲歌 | thresh 打 | thresher 打谷机

2. 打谷：then 然后 | thresh 打谷 | trench 深沟

3. 脱粒：terrain 地形 | thresh 脱粒 | tomato 番茄

4. 打谷,脱粒;推敲：smash 粉碎;击溃;猛掷 | thresh 打谷,脱粒;推敲 | fish 鱼

1. 给(玉米、小麦、水稻等)脱粒;打谷
When a cereal such as corn, wheat, or rice is threshed, it is beaten in order to separate the grains from the rest of the plant.

e.g. The corn was still sown, cut and threshed as it was a hundred years ago.
玉米的播种、收割、脱粒方法还和一百年前一样。

verb

1. give a thrashing to
beat hard

Synonym: thrashlamflail

2. beat the seeds out of a grain

Synonym: thrash

3. move or stir about violently

e.g. The feverish patient thrashed around in his bed

Synonym: convulsethresh aboutthrashthrash aboutslashtossjactitate

4. move like a flail
thresh about

e.g. Her arms were flailing

Synonym: flail