TSUMUGU · B2 · 字
繩
繩 ＝ 糸 ＋ 黽
ㄕㄥˊ · shéng
noun — rope, cord; (verb) to bind, hold to a standard
字源 FORM — what the parts do
糸義silk thread, twisted to cord
黽聲shéng — the sound side, clipped from 蠅a frog/toad seen from above — survives here only as the worn sound piece
Thread (糸) laid up into rope — the cord. The right side is 黽 clipped down (說文 reads it as 蠅省聲), carrying the sound shéng. From the rope, the plumb-line that judges true, then to hold a thing to that standard: 繩子、準繩、繩之以法.
故事 STORY — a scene to remember it by
一股股絲（糸）絞緊，垂下來——又是繩，又是量直的準繩。
Strand on strand of thread (糸) twisted tight and hung down — both a rope and the plumb-line that judges true.
字源記憶法
意 · Meanings
(本義)繩、索— rope, cord常用
→準繩— plumb-line, standard
⇒繩之以法— to hold to a standard, restrain
(本義) original meaning · → ⇒ each arrow = one more step of extension