1. 脱粒：to thresh 脱粒 | threshing 脱粒 | haymaking 割晒牧草

2. 打谷：thresher 打谷机 | threshing 打谷 | threshold 阈

3. 脱谷：thresher 脱粒机 | threshing 脱谷 | threshing cylinder 脱粒滚筒

4. 脱粒 机械法除绳锈：threshgrain 脱粒 | threshing 脱粒 机械法除绳锈 | threshingbarn 脱谷板棚

noun

1. the separation of grain or seeds from the husks and straw

e.g. they used to do the threshing by hand but now there are machines to do it