Start from the verb set: you put something down in the place where it is going to stay, and then you leave it there. Add -er and you have the one that does it. A setter is the one that puts something in position and hands it on — a person who fixes the questions, a player who places the ball, a dog that fixes itself in place, a piece of code that puts a value in. In every case, somebody else moves next.
可以先想 set 這個動詞：把一樣東西放到它該待的位置，然後讓它定在那裡。加上 -er，就是「做這件事的那一個」。所以 setter 可以想成「把東西擺定位的那一位」。他可能是人，可能是一隻狗，也可能是一段程式。擺好之後，接著動作的是別人：考生開始作答、隊友起跳扣球、獵人走過去。這個「我定位、你接手」的感覺，幾乎每個意思裡都找得到。
From the word’s history
Wiktionary's entry records setter as coming from Middle English settere, equivalent to set + -er.
本包提供的詞源寫著：setter 來自中古英語 settere，等於 set 加上 -er。這條線索跟現在的用法很合——不管是人、狗還是程式，共同點都是「做 set 這個動作的那一個」。
Wiktionary (kaikki extract) etymology for setter, etymology_number 1: "From Middle English settere, equivalent to set + -er."
登入就可以看每一支怎麼連回核心畫面。