thrash

beat, strike, hit, thrash, whip

这些动词均含有“打”之意。
beat: 普通用词，含义广泛，指连续打击。游戏、竞赛或战争中作打败解。
strike: 普通用词，多指急速或突然一次猛击。
hit: 普通用词，常与strike换用，侧重有目标的猛击，强调用力击中。
thrash: 侧重指用棍子或鞭子等痛打。
whip: 多指用鞭子抽打。

名词 thrash:

1. a swimming kick used while treading water

动词 thrash:

1. give a thrashing to; beat hard
   同义词：thresh, lam, flail
2. move or stir about violently
   同义词：convulse, thresh, thresh about, thrash about, slash, toss, jactitate
3. dance the slam dance
   同义词：slam dance, slam, mosh
4. beat so fast that (the heart's) output starts dropping until (it) does not manage to pump out blood at all
5. move data into and out of core rather than performing useful computation
6. beat the seeds out of a grain
   同义词：thresh
7. beat thoroughly and conclusively in a competition or fight
   同义词：cream, bat, clobber, drub, lick

1. The child was soundly thrashed.
   这个孩子被痛打了一顿。
2. Let's thrash the matter over before putting it on the agenda.
   我们先把这件事仔细研究一下，再把它列入议事日程。
3. As he swam, he thrashed the water with his hand.
   他游泳时用手拍打水。