brush (n.1)youdaoicibaDictYouDict[brush 词源字典]
"dust-sweeper, a brush for sweeping," late 14c., also, c. 1400, "brushwood, brushes;" from Old French broisse (Modern French brosse) "a brush" (13c.), perhaps from Vulgar Latin *bruscia "a bunch of new shoots" (used to sweep away dust), perhaps from Proto-Germanic *bruskaz "underbrush."[brush etymology, brush origin, 英语词源]