TSUMUGU · TOCFL 1 · 字
台
台 ＝ 厶 ＋ 口
ㄊㄞˊ · tái
noun — platform, station; Taiwan (short form)
字源 FORM — what the parts do
厶聲the worn shape of 以 yǐ — gave the old word its soundthe old word read yí
≠yǐ → tái — no sound road: tái rides the loan from 臺
A mouth (口) under 以 worn to 厶 — the graph's own word was yí, pleased, and it is long gone. The everyday tái is borrowed clothing: 台 stands in for 臺 the platform, and has for centuries — 台灣、台北、電視台.
意 · Meanings
(本義)悅（古讀 yí）— pleased — the graph's own word, gone from use
→台＝臺— the stand-in for 臺: platform, station常用
⇒台灣、電視台— Taiwan; the TV station
(本義) original meaning · → ⇒ each arrow = one more step of extension