脱退
だったい · dattai · JLPT N1 · noun
secession
🚪 脱 = slip out + 退 = step back; together, formally leave a group and withdraw
脱 means shed or escape, and 退 means retreat or withdraw. Combined, they describe formally leaving an organization, such as a member quitting a party or a region breaking away from a union.
脱 — flesh radical 月 (肉) + 兑 tuì (phonetic)
脱 is a semantic-phonetic compound. The flesh radical 月 (from 肉) signals the body, while 兑 supplies the sound. Originally it meant shedding flesh or skin, like a snake molting, and broadened to mean 'to take off, slip off, or escape.'
退 — walk radical 辶 + 艮 (stop/halt)
退 combines the walking/movement radical 辶 with 艮, which carries a sense of stopping or turning back. Together they depict the action of moving backward or withdrawing. The original sense of retreating or stepping back has remained stable through history.