TSUMUGU · TOCFL 2 (est.) · 字
誠
ㄔㄥˊ · chéng
adj/noun — sincere; sincerity, honesty
字源 FORM — what the parts do
Words (言) that are complete and whole (成) — speech with nothing held back, to be sincere. 成 chéng carries the sound exactly. 誠實、誠心、真誠.
故事 STORY — a scene to remember it by
把話（言）說全（成），不留半句假——誠。
The word (言) said in full (成), not half of it false — sincerity.
字源記憶法
意 · Meanings
(本義)誠實、真誠— sincere, honest常用
→誠心、誠意— sincerity of heart; good faith
⇒誠然— truly, indeed
(本義) original meaning · → ⇒ each arrow = one more step of extension