TSUMUGU · B2 (est.) · 字
蝕
蝕 ＝ 虫 ＋ 食
ㄕˊ · shí
verb — to eat away, corrode; (of sun/moon) to be eclipsed
字源 FORM — what the parts do
虫義an insect, a worm — the thing that gnaws
A worm (虫) eating into something, bite by bite (敗創也). 食 shí is both halves — it gives the sound and the eating itself (食亦聲). From the gnawing: 腐蝕 corrosion, and the sun or moon eaten away — 日蝕、月蝕.
故事 STORY — a scene to remember it by
蟲子（虫）趴在木頭上，一口一口（食）地啃，啃出一個洞。
A worm (虫) on the wood, gnawing (食) bite by bite, until a hole opens through.
字源記憶法
意 · Meanings
(本義)腐蝕、侵蝕— to corrode, eat away常用
→日蝕、月蝕— solar / lunar eclipse常用
(本義) original meaning · → ⇒ each arrow = one more step of extension