TSUMUGU · A2 (est.) · 字
鑰
鑰 ＝ 金 ＋ 龠
ㄧㄠˋ · yào
noun — a key
字源 FORM — what the parts do
龠聲yuè — gives the sound, worn from yuè to yàoa row of bamboo pipes bound together — a panpipe
IFyuè → yào — the sound slid as it was copied
A thing of metal (金) — 龠 yuè, the bound row of pipes, lends the sound and wears to yào. Together they write the key that lifts the bolt: 鑰匙、鎖鑰.
故事 STORY — a scene to remember it by
一截金（金）屬，齒口像排好的管子（龠）——插進去，鎖開了。
A sliver of metal (金), its teeth ranked like bound pipes (龠) — it slides in, and the lock gives.
字源記憶法
意 · Meanings
(本義)鑰匙— a key常用
→鎖鑰、關鑰— lock-and-key; a strategic pass
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
龠yuèthe sound-half standing alone — a panpipe; 鑰 bolts onto its left鎖＝ ＋ 𧴪suǒthe partner in 鎖鑰 — the lock the key opens