From the word’s history
From Middle English; her + -self.
由 her 加上 -self 組成。
Picture an action she does that curves right back to land on her — she is both the one doing it and the one it happens to. That loop-back-to-her is the heart of the word; all the other uses are ways of pointing hard at 'her, that very same person'.
可以想成她做的一個動作，轉了一圈又落回她自己身上——做這件事的是她，被這件事影響到的也是她。這個「動作繞回她本人」的迴圈是這個字的核心；其他用法都是用不同方式，把焦點重重地壓在「她，就是同一個她」上面。
登入就可以看每一支怎麼連回核心畫面。