成效
chéngxiào · HSK 5
result
✅ 成 = accomplish + 效 = effect; the result of accomplishing something
成 means to complete or succeed; 效 means effect or efficacy. Together 成效 names the concrete effect or result that comes from a successful effort — the payoff, not just any outcome.
成 — 戊 (halberd/weapon) + 丁 (nail/man)
Originally a pictograph of a halberd or axe-like weapon, suggesting the act of completing a task by force. Over time it shifted from 'to subdue' to the broader meaning 'to accomplish' or 'to become'. The 丁 element inside also hints at the chéng sound.