達成
たっせい · tassei · JLPT N1 · noun
accomplishment
🏆 達 = reach + 成 = complete: reaching a goal and bringing it to completion
達 means to reach or attain, and 成 means to complete or succeed. Together they describe arriving at a target and finishing it, which is the core sense of achievement.
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.