TSUMUGU · A2 (est.) · 字
速
速 ＝ 辶 ＋ 束
ㄙㄨˋ · sù
adj/noun — fast, quick; speed
字源 FORM — what the parts do
辶義walking, going (辵)
IFshù → sù — the bundle loosens to sù
Going (辶) at a clip — quick, fast. 束 shù, a bundle bound tight, carries the sound, shifted to sù — motion drawn taut and let fly. From quickness: 速度、快速、迅速.
故事 STORY — a scene to remember it by
綁緊的一束（束）一鬆，走（辶）得飛快——速。
The tied bundle (束) loosed, and the going (辶) is fast — speed.
字源記憶法
意 · Meanings
(本義)快速、迅速— fast, quick常用
→速度— speed, velocity常用
→速成— done quickly, crash (course)
(本義) original meaning · → ⇒ each arrow = one more step of extension