TSUMUGU · B2 (est.) · 字
契
契 ＝ 丯 ＋ 刀
ㄑㄧˋ · qì
noun/verb — a contract, deed; to agree, fit
字源 FORM — what the parts do
丯聲the notch-marks scored as the sound piecetally-cuts, worn into the top-left
Notches scored with a knife (刀) onto a tally; the cut-marks up top (丯) carry the sound. Split the tally in two and the matched halves prove a bargain — 契約、契據; halves that fit are also two minds that fit: 默契、契合.
故事 STORY — a scene to remember it by
刀（刀）在木券上刻幾道（丯），剖成兩半——日後一對，憑契為證。
A knife (刀) scores the tally (丯), then splits it in two — match the halves later, and the deal holds.
字源記憶法
意 · Meanings
(本義)契、契券— a tally, scored deed常用
→契約、契據— a contract, deed常用
⇒默契、契合— to fit, agree — matched halves
(本義) original meaning · → ⇒ each arrow = one more step of extension
關 · Related
楔xiēshares the top -body — 楔 takes the tree 木 for a wedge, 契 takes 喫chīshares the top body — 喫 takes 口 to eat, 契 takes