entries → 扣
TSUMUGU · TOCFL B2 (est.) · 字
扣 character · TOCFL B2 (est.)
扣 ＝ 扌 ＋ 口
ㄎㄡˋ · kòu
verb — to button up; to deduct; to detain

字源 FORM — what the parts do

扌義the hand — doing the fastening
口聲kǒu — gives the sounda mouth, an opening
Tkǒu → kòu — the tone tips
The hand (扌) hooking and holding — 口 kǒu gives the sound, tone tipped to kòu. The original was to pull or tether; from the hand that fastens come buttoning up, and holding back: 扣子、扣款、扣留.

故事 STORY — a scene to remember it by

手（扌）一勾，把扣子（口）穿進孔裡，拉緊——扣上。
The hand (扌) hooks the button through its opening (口) and pulls it tight — to button up.
字源記憶法
意 · Meanings
(本義)牽、扣住— to pull, fasten常用
→扣子、扣上— a button; to button up常用
⇒扣款、扣留— to deduct; to detain
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
叩kòuthe lookalike — 叩 sets 口 before 卩 (a kneeling figure) for knocking, 扣 puts the hand (扌) before 口 for fastening