TSUMUGU · TOCFL B2 (est.) · 字
餘
餘 ＝ 食 ＋ 余
ㄩˊ · yú
noun/verb — surplus, remainder; to have left over
字源 FORM — what the parts do
余聲yú — the phonetic
Food (食, 飠) with 余 yú for the sound: food enough and over — abundance, and so what is left over: 剩餘、其餘、餘力. The reading is exact, yú to yú. 余 also gives 途、徐、敘.
故事 STORY — a scene to remember it by
飯（飠）吃飽了還剩一桌——多出來的，就是餘。
The meal (飠) eaten and still a tableful left — what remains over is 餘.
字源記憶法
意 · Meanings
(本義)剩餘、其餘— surplus, the rest常用
→餘力、餘地— spare capacity, room to spare
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
余yúthe phonetic — 餘 adds (飠) to make it the food-surplus除＝ 阝 ＋ chúthe same with 阜 (阝) — there a step is removed, here food is left over