entries → 針
TSUMUGU · TOCFL B2 (est.) · 字
針 character · TOCFL B2 (est.)
針 ＝ 金 ＋ 十
ㄓㄣ · zhēn
noun — a needle; an injection

字源 FORM — what the parts do

金義metal
十形a crossed line, the figure ten
Metal (金) drawn to one fine point, 十 marking the crossed shape — a needle. From sewing it spreads: 打針 the injection, 針灸 the acupuncture point, 指南針 the compass needle.

故事 STORY — a scene to remember it by

一小段金屬（金）磨尖了，細得像根線——穿過布，縫上。
A sliver of metal (金) ground to a point, thin as thread — it slips through the cloth and sews.
字源記憶法
意 · Meanings
(本義)針— a sewing needle常用
→打針— an injection常用
⇒針灸、指南針— acupuncture; the compass needle
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
箴zhēnthe elder form — 箴 keeps 咸 under bamboo 竹; 針 is the metal one, 金 + 十釣＝ 金 ＋ 勺diàothe kin tool — 釣 is the bent hook, 針 the straight point