TSUMUGU · TOCFL 1 · 字
奶
ㄋㄞˇ · nǎi
noun — milk; grandma
字源 FORM — what the parts do
Woman (女) with 乃 nǎi for sound, exact. The nursing word — first the breast and its milk, then the cow's share in 牛奶, then the grandmother the family calls by it, doubled: 奶奶.
故事 STORY — a scene to remember it by
孩子在母親（女）懷裡吃奶，吃著吃著就睡著了。
At his mother's (女) breast the baby feeds, and feeding, falls asleep.
字源記憶法
意 · Meanings
(本義)乳房、餵奶— the breast; to nurse
→牛奶、奶茶— milk常用
→奶奶— grandma常用
(本義) original meaning · → ⇒ each arrow = one more step of extension