TSUMUGU · TOCFL 2 (est.) · 字
梯
ㄊㄧ · tī
noun — ladder, stairs
字源 FORM — what the parts do
Idì → tī, d softens to t — the same 弟 in 第 dì, 涕 tì, 剃 tì
Wood (木) plus 弟. 說文: 木階也 — wooden steps. 弟 lends the sound, the d worn to t; it builds 第、涕、剃. Rungs of wood, one above the next: the ladder.
故事 STORY — a scene to remember it by
一根根木頭（木）橫著釘上去，弟弟（弟）跟在哥哥後面一級級往上。
Wooden rungs (木) nailed one above the next; the younger brother (弟) climbs them in order, step after step.
字源記憶法
意 · Meanings
(本義)樓梯、梯子— stairs; ladder常用
→階梯— a flight of steps
⇒梯田— terraced fields — stepped land
(本義) original meaning · → ⇒ each arrow = one more step of extension