TSUMUGU · TOCFL 2 (est.) · 字
坪
ㄆㄧㄥˊ · píng
noun — flat open ground; a unit of floor area (~3.3 m²)
字源 FORM — what the parts do
Level ground (土) — earth made flat. 平 píng carries the sound straight across, and lends its own meaning of "level" besides, the same donor under 評 and 苹. From flat ground comes the floor-area unit measured on it: 草坪、三十坪.
故事 STORY — a scene to remember it by
一塊地（土），鋪得平平（平）的——草坪。
A patch of ground (土), laid out flat and even (平) — a lawn.
字源記憶法
意 · Meanings
(本義)草坪、坪地— flat open ground常用
→三十坪— a unit of floor area, about 3.3 m²常用
(本義) original meaning · → ⇒ each arrow = one more step of extension