破竹建瓴 [ㄆㄛˋ ㄓㄨˊ ㄐㄧㄢˋ ㄌㄧㄥˊ; po4 zhu2 jian4 ling2] lit. smash bamboo, overturn water tank (idiom); fig. irresistible force ◄ ►