TSUMUGU · A2 (est.) · 字
刷
刷 ＝ 刂 ＋ 㕞
ㄕㄨㄚ · shuā
verb — to brush; to scrub; noun — a brush
字源 FORM — what the parts do
刂義a knife at the right — the scraping edge
㕞聲shuā — lends the sound and the wiping actiona hand (又) wiping a cloth under a roof (尸), worn down to the left block
A blade (刂) scrapes a surface clean — the old gloss 刮也, to scrape. The left side is 㕞 shuā worn down, a hand wiping cloth, which both names the action and carries the sound. From scraping clean, the everyday senses: 牙刷 toothbrush, 刷洗 scrub, 刷掉 strike off a list.
故事 STORY — a scene to remember it by
一隻手抓著刷子，貼著面一刮（刂）——刮乾淨了。
A hand drags the brush flat across the surface, the edge (刂) scraping it clean.
字源記憶法
意 · Meanings
(本義)刮、刷洗— to scrape; to scrub常用
→刷子、牙刷— a brush; toothbrush常用
⇒刷掉、刷下來— to strike off; to eliminate
(本義) original meaning · → ⇒ each arrow = one more step of extension