不由自主 bù yóu zì zhǔ 🔊 can't help but; involuntarily HSK 7–9 + Keep this word Meanings bù yóu zì zhǔ (idiom) can't help but; involuntarily Its characters 不bùnot; noHSK 1由yóuto followHSK 4自zìself; oneselfHSK 4主zhǔowner