TSUMUGU · TOCFL 2 (est.) · 字
座
座 ＝ 广 ＋ 坐
ㄗㄨㄛˋ · zuò
noun — seat; a stand, base; (measure word for large fixed things)
字源 FORM — what the parts do
广義a building, a roof
Under a roof (广) sits 坐 — two people on the ground, the verb to sit — and it lends both its meaning and its sound. 坐 is the act; 座 is the fixed thing you sit on or set down on: a seat (座位), a base (底座), and the counter for things planted in place — 一座山, a whole mountain.
故事 STORY — a scene to remember it by
屋頂（广）下面安一張坐（坐）的東西，釘死不動——那就是座。
Under the roof (广) a thing to sit on (坐) is fixed in place — that is a seat.
字源記憶法
意 · Meanings
(本義)座位— seat常用
→底座、基座— a base, a stand — what something rests on
⇒一座山、一座橋— counter for large fixed things常用
⇒星座— constellation — seats fixed in the sky
(本義) original meaning · → ⇒ each arrow = one more step of extension