撤销
chèxiāo · HSK 6
to repeal; to revoke
↩️ 撤 withdraw + 销 cancel = withdraw-and-cancel = revoke
撤 means withdraw/remove (as in 撤退 retreat); 销 means cancel/eliminate (as in 销毁 destroy). Together: pull back and nullify — what you do with an order, a decision, or an Ctrl+Z undo.
撤 — hand 扌 + 育 yù + 攵 (strike)
撤 combines the hand radical 扌 with 育 (raise/nurture) and 攵 (action/strike), suggesting an action done by hand to remove or take away. Originally written 徹 in some forms, it carried the sense of pulling something through or away. Today it means to withdraw, remove, or retreat.
销 — metal radical 钅 + 肖 xiāo (phonetic)
销 is a semantic-phonetic compound. The metal radical 钅 (金) signals a meaning related to metal, while 肖 supplies the sound xiāo. It originally meant to melt or smelt metal, then extended figuratively to 'dissolve away,' and later to modern senses like 'sell' (move goods away) and 'cancel/expend.'