站在中間、把一份變成兩份的東西
這個家族就是核心畫面本身。差別只在被分開的是什麼：一個房間、一條馬路，還是一股電流。
noun · B1
A thing that splits a space or a set of things into separate parts — for example a screen that stands in a room, or a stiff card put between the sections of a file.
隔板；分隔物
核心畫面
Picture one long table with things spread all over it, and then somebody stands a board upright across the middle. Nothing was added and nothing was taken away, but now there is a this side and a that side. A divider is always that board: the object standing in the middle that turns one thing into two parts. Change what the table is — a room, a road, a file of paper, a signal in a wire — and you have all the meanings of the word.
可以想成一張長桌，東西攤了一整面。然後有人在中間豎起一塊板子。沒有多什麼，也沒有少什麼，但現在有了「這一邊」和「那一…更多收起
可以想成一張長桌，東西攤了一整面。然後有人在中間豎起一塊板子。沒有多什麼，也沒有少什麼，但現在有了「這一邊」和「那一邊」。divider 講的就是那塊板子：站在中間、把一份變成兩份的那個東西。把桌子換成房間、馬路、資料夾或電線裡的訊號，這個字的各種意思就都出來了。From the word’s history
The word is divide plus -er. The ending -er names whoever or whatever does the thing, so a divider is simply the one that divides; because -er covers both people and objects, the same word can name a screen, a strip of road, or a piece of a circuit.
這個字是 divide 加上 -er。-er 的意思是「做這件事的人或東西」，所以 divider 就是「負責分開的那個」。也因為 -er 人和物都涵蓋，同一個字可以指屏風、可以指馬路中間那條，也可以指電路裡的元件。
Wiktionary entry for divider (packet evidence: 'From divide + -er.')
Two branches
把一段長度分成等分的工具
這裡的東西不是站在中間不動，而是自己走過去，一步一步把一條線切成等分。分開的動作還在，只是從「擋」變成「量」。
noun · C1
Dividers are a drawing tool made of two straight metal legs joined at the top, each ending in a sharp point, used to measure a length on a drawing or to mark that length somewhere else.
分規（兩腳規）