雷
打
不
动

Word Definition - 雷打不动

léi dǎ bù dòng not shaken by thunder (idiom); the arrangements are unalterable; to adhere rigidly to regulations; will go ahead whatever happens (of an arrangement or plan)

Individual Character Details

雷 léi, léi
打 dá, dǎ
不 bù
动 dòng