TSUMUGU · B1 (est.) · 字
穴
穴 ＝ 宀 ＋ 八
ㄒㄩㄝˊ · xué
noun — cave, hole, den; acupuncture point
字源 FORM — what the parts do
宀義a roof, a cover — the cave mouth overhead
IFbā → xué — the reading shifted far from the donor
An earth dwelling (土室也) — a hollow with cover overhead (宀) where one lives. 八 bā carries the sound, shifted hard to xué. From the dug-out cave: 洞穴、巢穴, then the body's hollows — 穴道、穴位.
故事 STORY — a scene to remember it by
山壁挖出一個洞，頂上有岩遮著——人鑽進去，就是穴。
A hollow dug into the hillside, rock arching over (宀) — crawl in, and it is the den.
字源記憶法
意 · Meanings
(本義)洞穴、巢穴— cave, hole, den常用
→孔穴— an opening, orifice
→穴道、穴位— acupuncture point
(本義) original meaning · → ⇒ each arrow = one more step of extension