Korean: 2 NHSK word(s): 螺丝钉* 6 luo2 si1 ding1screw 斩钉截铁* 6 zhan3 ding1 jie2 tie3to chop the nail and slice the iron (idiom)/ resolute and decisive/ unhesitating/ definitely/ without any doubt KOREAN6000 word(s): KOREAN 2500 New HSK words): KOREAN Sentence(s):