entries → 約束
TSUMUGU · TOCFL 5 (est.) · 詞
約束 word · TOCFL 5 (est.)
約束 ＝ 約 ＋ 束
ㄩㄝ ㄕㄨˋ · yuēshù
verb — to bind, to restrain; noun — a constraint

字源 FORM — what the parts do

約to bind, agree (約定)yuē糸 the cord; 勺 sháo gives the sound
束to tie into a bundle (束縛)shùa cord drawn tight around 木, the wood
約束，約定的約，束縛的束。

故事 STORY — a scene to remember it by

一根繩（糸）綁過來，把柴（木）捆緊。
A cord (糸) comes round and pulls the firewood (木) into a tight bundle.
字源記憶法
關 · Related
約定yuēdìngthe same 約 — an agreement