TSUMUGU · TOCFL B2 (est.) · 字
鍵
ㄐㄧㄢˋ · jiàn
noun — a bolt, key; (鍵盤) a key on a keyboard
字源 FORM — what the parts do
The metal (金) pin that holds a structure shut — a bolt, the part everything hinges on. 建 jiàn carries the sound exactly. From the bolt comes 關鍵 the crux, and the pressed key: 鍵盤, 按鍵.
故事 STORY — a scene to remember it by
一根金（金）插進閂孔，門就鎖死了——抽掉它，全鬆。
A metal (金) pin slid into the bolt-hole, and the door locks fast — pull it, and the whole thing gives.
字源記憶法
意 · Meanings
(本義)鍵、門鍵— a bolt, a pin
→關鍵— the crux, the key point常用
⇒鍵盤、按鍵— a keyboard; a key常用
(本義) original meaning · → ⇒ each arrow = one more step of extension