TSUMUGU · TOCFL 1 (est.) · 字
因
因 ＝ 囗 ＋ 大
ㄧㄣ · yīn
conj — because; noun — cause
字源 FORM — what the parts do
囗義a mat, four-cornered
A person (大) lies spread out on a mat (囗) — the original graph for the sleeping mat, now written 茵. What you lie on, you lean on: from resting-on came relying-on (因襲), and from relying-on, what a matter rests on — 原因、因為.
故事 STORY — a scene to remember it by
草蓆（囗）鋪好，人（大）往上一躺，整個背貼著它。
The mat (囗) is spread; the person (大) lies down, whole back against it.
字源記憶法
意 · Meanings
(本義)蓆子（後作茵）— a mat (now written 茵)
→因襲、因循— to follow, go along with
⇒原因、因為— cause; because — what the matter rests on常用
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
困＝ ＋ 木kùnthe lookalike box — 困 hems in a tree 木, 因 lays a person down茵yīnthe mat sense regrown, grass 艹 on top