One way to hold the word: a hand reaches in from the side and takes hold of something that was about to run its own course, so that it no longer does. The clearest version is the night before a race, when someone gets to the horse. Change what the hand takes hold of and you get the rest — a instead of a horse, a plan instead of a , or just your sleeve in the corridor. This is a picture offered to make the senses hang together, not a claim about where the word came from; the packet gives no etymology.
可以想成有一隻手從旁邊伸進來，抓住一件本來要照自己的樣子跑下去的事，讓它跑不成。最清楚的版本，是比賽前一晚有人摸到那匹馬旁邊。接著只要換掉被抓住的東西，其他意思就都出來了：換成陪審員，換成一個計畫，或者只是走廊上抓住你的袖子。要說明白：這是為了讓幾個意思串得起來而提供的畫面，不是在說這個字的來源。手上的資料沒有任何語源說明。
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