解救
jiě jiù · HSK 7
to rescue
🆘 解 (untie/free) + 救 (save) = untie someone from trouble and save them
解 means to loosen or free; 救 means to save or rescue. Together they mean stepping in to free someone from a bad situation. Sounds like jyeah-jyoh, with both syllables on the falling-then-rising third tone.
解 — horn 角 + knife 刀 + ox 牛
解 is an ideograph showing hands using a knife (刀) to separate the horn (角) from an ox (牛). The original meaning was to butcher or dismember an ox, which broadened to 'untie, separate, loosen,' and then extended figuratively to 'explain' or 'understand'—to take something apart mentally.
救 — 求 (seek/phonetic) + 攵 (strike/action)
A semantic-phonetic compound. The right side 攵 (a hand holding a stick) gives the action sense of intervening or stopping, while 求 supplies the sound 'jiu'. Originally meaning to halt or stop something bad, it extended to 'rescue, save, aid'.