TSUMUGU · TOCFL B2 (est.) · 字
疏
疏 ＝ 疋 ＋ 㐬
ㄕㄨ · shū
verb/adj — to dredge open, unclog; sparse, distant; to neglect
字源 FORM — what the parts do
疋義a foot — wading through to clear a way
㐬聲liú — gives the sounda child flowing out head-first — the same donor under 流梳
IT≠liú → shū — initial shifts to sh, tone too; 流 keeps the l
A foot (疋) working a channel open — to dredge, to let things flow through. 㐬 liú carries the sound, the same flowing donor under 流 and 梳, the initial worn from l to sh. From clearing a passage: 疏通, 疏導; from things spread thin: 稀疏, 疏遠; and the gap of attention, 疏忽.
故事 STORY — a scene to remember it by
腳（疋）一蹚，淤住的水道通了，水嘩地流開——疏。
A foot (疋) wades in, the clogged channel opens, and the water runs free — to dredge clear.
字源記憶法
意 · Meanings
(本義)通— to dredge open, unclog常用
→疏通、疏導— to clear a passage; to channel
⇒稀疏、疏遠— sparse; distant常用
⇒疏忽— to neglect, overlook
(本義) original meaning · → ⇒ each arrow = one more step of extension