TSUMUGU · TOCFL 2 (est.) · 字
齡
ㄌㄧㄥˊ · líng
noun — age, years (of a person)
字源 FORM — what the parts do
Teeth (齒) with 令 líng for the sound, exact. You read an animal's age by its teeth, and a person's by counting years — so 齒 marks the count and 令 supplies the sound: 年齡、同齡.
故事 STORY — a scene to remember it by
張口數牙（齒），一顆一年——數出一個人的年紀。
Open the mouth, count the teeth (齒), one a year — and you have read off a person's age.
字源記憶法
意 · Meanings
(本義)年齡— age, years常用
→同齡、適齡— of an age — the same cohort, the right age
(本義) original meaning · → ⇒ each arrow = one more step of extension