Behind every use there is one simple picture: something that turns and turns until whatever it holds is wound round itself. Hold a wet cloth at both ends and turn your hands in opposite directions, and you have the whole idea. A column of air can do it, and you get a tornado. A person can do it to the facts, bending the story this way and that so nobody can pin it down. A room full of friends can do it to their own arms and legs, and that is a party game. The picture is always the same turn; what changes is what gets twisted.
The word is twist plus -er, and the form goes back to Middle English twyster, so the parts already carry the picture: the one that twists.
這個字是 twist（扭轉）加上 -er（做這件事的人或東西），來源可追到中古英語的 twyster。字的組成本身就說明了核心畫面：會扭轉的那一個。
Wiktionary entry for twister (kaikki extract, supplied in packet): From Middle English twyster, equivalent to twist + -er.
Three branches
扭成一柱的風
把核心的扭轉畫面放在空氣上：一整柱風自己轉起來，從雲一路伸到地面。這是三個家族裡最具體、最容易看見的一個。
noun · B2
A tornado: a tall column of spinning wind that comes down from a storm cloud to the ground and pulls apart whatever it touches. This is the everyday American word for it; tornado is the word used in careful or official writing.
龍捲風
把話扭來扭去的人
同樣的扭轉，這次發生在說出來的話上。事實被拗過來拗過去，聽的人抓不住他到底承諾了什麼。
noun · C1
Someone who cheats other people, especially to get money out of them. Calling a person a twister says you think they are dishonest and you do not trust them at all. It is informal, and it belongs to British English.
騙子
把身體扭成一團的遊戲
扭轉的對象換成玩的人自己。手腳一個一個被指到不同的點上，身體就被自己扭成一團，名字直接把玩法講了出來。
noun · B1
Twister: a party game in which players put their hands and feet on coloured spots on a large mat, following the positions a spinner chooses, until someone loses their balance and falls. It is usually written with a capital T.
扭扭樂（派對遊戲）