无尘粉笔 wúchénfěnbǐ dustless chalk Definitions Defs Origin Strokes Stroke Words Sentences Sents 无 無 wú adjectiveverb to not have to not have; there is no; lack; (as prefix) non-; un-; -less尘 塵 chén noun dust (bound form) dust; dirt; earth; tiny particles of soil粉笔 粉筆 fěnbǐ noun chalk chalk; stick of chalk used for writing on a blackboard