魚本身
畫面裡的主角，也是這個字最早、最實在的一條。
noun · B1
A small silvery sea fish of the herring family, often sold cooked in a flat tin, with the fish lying side by side in oil or sauce.
沙丁魚
核心畫面
Open a flat tin and look at what is inside. The fish are small, they are lying side by side, each one touching the next, turned so that the tin holds as many as it possibly can. Nothing in there chose its position, and there is no space left over. Every use of this word comes back to that tin — sometimes to the fish themselves, and sometimes to the way they are lying.
可以想成打開一個扁罐頭，看著裡面。魚很小，一條挨著一條側躺，頭尾交錯，排到罐子裝得下最多為止。裡面沒有一條魚是自己選…更多收起
可以想成打開一個扁罐頭，看著裡面。魚很小，一條挨著一條側躺，頭尾交錯，排到罐子裝得下最多為止。裡面沒有一條魚是自己選位置的，也沒有剩下任何空隙。這個字的每一種用法都回到那個罐頭：有時候講的是魚本身，有時候講的是牠們躺著的那個樣子。From the word’s history
The supplied source gives sardine as borrowed from French sardine, cognate with Spanish sardina and Italian sardina, from Latin sardīna, from Ancient Greek sardínē. The name is the fish; the crowding senses are later uses of the picture.
資料裡寫的是借自法文 sardine，與西班牙文 sardina、義大利文 sardina 同源，再往上是拉丁文 sardīna、古希臘文 σαρδίνη。這個名字本來就是魚；「擠」的那些用法是後來借用罐頭畫面才有的。
Wiktionary etymology supplied in evidence packet (kaikki:3f6f69a190036ae4:958016870): French sardine < Latin sardīna < Ancient Greek σαρδίνη.
Two branches
罐頭裡那個擠法
不再看魚，改看牠們排列的方式，然後把這個排列方式套到人身上。
noun · B2
If people are packed like sardines, they are pressed tightly together in a space that is too small for them, with no room left between them.
擠得像沙丁魚（罐頭）