entries → 訂
TSUMUGU · A2 (est.) · 字
character · A2 (est.)
訂 =
ㄉㄧㄥˋ · dìng
verb — to agree, settle; to book, order; to bind (a volume)

字源 FORM — what the parts do

speech, words
dīng — gives the sounda nail, seen head-on
Tdīng → dìng — same sound, fourth tone
Words (言) pinned down — to settle an agreement by speech. 丁 dīng, a nail, carries the sound and the picture of fixing fast; the reading drops to dìng. From the settled word: 訂購、訂閱、訂正.

故事 STORY — a scene to remember it by

一句話說定,像釘子()一錘到底——訂了。
The word spoken and settled, driven home like a nail (丁) — booked.
字源記憶法
意 · Meanings
(本義)約定、訂定— to agree, settle常用
訂購、訂閱— to order; to subscribe常用
訂正— to correct, amend
(本義) original meaning · → ⇒ each arrow = one more step of extension