打断
dǎ duàn · HSK 6
to interrupt
✋ 打 (hit) + 断 (break/sever) = hit-and-sever → interrupt
打 means hit/strike, 断 means break or sever. Together: to strike something so it breaks off — used for cutting someone off mid-sentence, halting an action, or fracturing a bone.
打 — hand radical 扌 + nail 丁
打 combines the hand radical 扌 (action with the hand) with 丁 (originally a nail), suggesting striking or hitting with the hand. 丁 also serves as a phonetic hint in older readings. The meaning broadened from 'to strike' to a general verb for many hand-based actions, like 打电话 'make a phone call'.
断 — thread 㡭 (silk bundle) + axe 斤
Originally written with 㡭 (entangled silk threads) on the left and 斤 (axe) on the right, depicting an axe cutting through bundled threads. From this concrete image of severing came the meanings 'to cut off,' 'to break,' and by extension 'to decide' or 'judge'—as in resolving a matter decisively.