閃開擋路的東西
最字面的一組：有人或有東西正往前走，為了不撞上什麼，猛地橫一下。
verb · B2
To make a sudden sideways move while you are still going forward, usually so that you do not hit something.
（突然）閃避轉向
核心畫面
A line was going straight, and then it did not. Something is moving forward — a bike, a ball, a person keeping a promise — and suddenly it goes sideways out of that line. Two things travel with the picture everywhere on this page: the movement was already under way, and the sideways part is abrupt rather than gradual. What changes between the senses is only what the straight line was made of, and whether anything chose to leave it.
可以想成一條本來直直往前的線，突然橫了一下。有東西正在往前走——腳踏車、球，或是一個守著承諾的人——然後它從那條線上…更多收起
可以想成一條本來直直往前的線，突然橫了一下。有東西正在往前走——腳踏車、球，或是一個守著承諾的人——然後它從那條線上橫著岔開。這一頁每個意思都帶著兩件事：動作本來就在進行，而且橫的那一下是突然的，不是慢慢偏。變的只有兩點：那條直線是什麼做的，還有這一下是誰決定的。From the word’s history
The source traces the word back to Old English sweorfan, whose meanings it lists as to file, rub, polish, scour, turn aside. That last one, turn aside, is the thread the modern word holds on to. The source does not explain how the rubbing meanings and the turning meaning relate, so nothing more is claimed here.
資料把這個字一路記到古英文 sweorfan，並列出它的意思：磨、擦、拋光、刷，以及「轉向一邊」。今天的 swerve 抓住的是最後那一個。至於磨擦那幾個意思跟轉向怎麼連起來，資料沒有說，所以這裡就不多推。
packet Wiktionary etymology_text for swerve: 'from Old English sweorfan (to file; rub; polish; scour; turn aside)'; kaikki:3f6f69a190036ae4
Three branches
在空中拐彎
一樣是離開直線，但沒有人在操控：彎的原因是旋轉和空氣。
verb · B2
Of a ball or another moving object, to travel through the air along a curved path instead of a straight one.
（球）走弧線飛
偏離自己選定的路
直線不再是馬路，而是一個人打算守住的路；橫出去就是偏離。
verb · C1
To move away from a belief, a plan, a purpose or a duty that you had set yourself.
偏離（原本的路線、信念）