TSUMUGU · TOCFL 1 (est.) · 字
信
信 ＝ 亻 ＋ 言
ㄒㄧㄣˋ · xìn
verb/noun — to believe, trust; a letter; sincere
字源 FORM — what the parts do
亻義a person
A person (亻) standing by their word (言): what they say can be relied on — that is trust. From standing-by-the-word: 相信 to believe, 信任 to trust; the word sent across distance, 信件 a letter; the quality itself, 信用. No phonetic piece — the two halves spell the meaning straight.
故事 STORY — a scene to remember it by
一個人（亻）站在自己說的話（言）旁邊，說到做到——信得過。
A person (亻) stands beside their own words (言) — what's said holds. Trustworthy.
字源記憶法
意 · Meanings
(本義)誠實、可信— sincerity, trustworthiness常用
→相信、信任— to believe, to trust常用
⇒信件、書信— a letter — the word sent across常用
(本義) original meaning · → ⇒ each arrow = one more step of extension