Old English þrescan, þerscan, "to beat, sift grain by trampling or beating," from Proto-Germanic *threskan "to thresh," originally "to tread, to stamp noisily" (cognates: Middle Dutch derschen, Dutch dorschen, Old High German dreskan, German dreschen, Old Norse þreskja, Swedish tröska, Gothic þriskan), from PIE root *tere- (1) "to rub, turn" (see throw (v.)).
The basic notion is of men or oxen treading out wheat; later, with the advent of the flail, the word acquired its modern extended sense of "to knock, beat, strike." The original Germanic sense is suggested by the use of the word in Romanic languages that borrowed it, such as Italian trescare "to prance," Old French treschier "to dance," Spanish triscar "to stamp the feet."
中文解释
1. thrash <===> thresh.2. throw => thrash, thresh.3. The first element of threshold is identical with English thresh.4. threshold => thresh.5. 该词的最初含义是用脚把谷粒踩破，使其脱壳，后来由于连盖（flail）的出现，代替了用脚踩这种费力、低效的工作，于是该词扩展除了如今的含义“脱粒、打谷”。6. 谐音“施虐袭，碎、虐、袭”。
实用例句
1. Farmers thresh grain with threshing machines.
农民用脱粒机脱粒.
来自《简明英汉词典》
2. Nowadays most farmers use a machine to thresh their wheat.
现在多数农民使用机器脱麦粒.
来自互联网
3. A firewall screen is all thresh to our datum.
防火墙能保护我们的资料,当然也能防病毒.
来自互联网
4. In some villages farmers use a machine to thresh wheat.