TSUMUGU · TOCFL B2 (est.) · 字
凳
凳 ＝ 登 ＋ 几
ㄉㄥˋ · dèng
noun — a stool, a bench (no back)
字源 FORM — what the parts do
Tdēng → dèng — only the tone shifts
几義a small low table — here the seat
A low stand (几) you step up onto — the stool. 登 dēng carries the sound, only the tone falling to dèng, and its own picture of climbing on suits a thing you mount to sit: 板凳、凳子.
故事 STORY — a scene to remember it by
兩隻腳一登（登），就坐上了那張矮架子（几）。
Two feet step up (登) and settle onto the low stand (几).
字源記憶法
意 · Meanings
(本義)凳子、板凳— a stool, a bench常用
→矮凳、長凳— a low stool; a long bench
(本義) original meaning · → ⇒ each arrow = one more step of extension