TSUMUGU · TOCFL 1 · 字
邊
邊 ＝ 辶 ＋ 臱
ㄅㄧㄢ · biān
noun — side, edge
字源 FORM — what the parts do
辶義walking, the road
臱聲gives the sound自 on top, 方 at the base — a graph that survives only inside 邊
ITmián → biān — the m hardened to b
Walking (辶) at the very rim — 說文 glosses 邊 as going along the brink of a drop. 臱 gives the sound, mián hardened to biān. From the brink to every rim and side: 旁邊、海邊、一邊.
故事 STORY — a scene to remember it by
小路貼著崖走（辶），腳外一步就是空的。
The trail (辶) hugs the cliff's lip; one step out is empty air.
字源記憶法
意 · Meanings
(本義)崖邊— the brink — walking the very edge
→旁邊、海邊— side, edge常用
⇒一邊⋯一邊⋯— one side and the other — two things at once
(本義) original meaning · → ⇒ each arrow = one more step of extension