TSUMUGU · TOCFL B1 (est.) · 字
序
序 ＝ 广 ＋ 予
ㄒㄩˋ · xù
noun — order, sequence; a preface
字源 FORM — what the parts do
广義a building, a roofed hall
ITyú → xù — initial and tone both shift
A roofed hall (广) with 予 yú for the sound, the initial and tone shifting to xù. The original is the side walls of a hall — the east-and-west walls that line a room in order. From walls set in line: sequence, and the preface that comes first in line: 順序、秩序、序言.
故事 STORY — a scene to remember it by
廳堂（广）兩側的牆一道接一道，排得整整齊齊，先後分明。
Along the hall (广), the walls run one after another, set in clean order, first and last made plain.
字源記憶法
意 · Meanings
(本義)牆序、堂序— the lined side-walls of a hall
→順序、次序— order, sequence常用
→序言、序文— preface — what comes first
(本義) original meaning · → ⇒ each arrow = one more step of extension