brush (v.1)youdaoicibaDictYouDict[brush 词源字典]
late 15c., "to clean or rub (clothing) with a brush," also (mid-15c.) "to beat with a brush," from brush (n.1). Related: Brushed; brushing. To brush off someone or something, "rebuff, dismiss," is from 1941.[brush etymology, brush origin, 英语词源]