bureauyoudaoicibaDictYouDict[bureau 词源字典]
bureau: [17] Etymologically, bureau seems to mean ‘red’. Its ultimate source is probably Greek purrhós ‘red’, a derivative of pur ‘fire’ (as in English pyre and pyrotechnic), which is related to English fire. This was borrowed into Latin as burrus, which developed into Old French bure ‘dark brown’. This seems to have formed the basis of a derivative burel, later bureau, meaning ‘dark brown cloth’.

This cloth was used for covering the writing surface of desks, and so eventually bureau came to mean ‘writing desk’ itself. Offices being the natural habitat of writing desks, bureau was later applied to them too. The derivative bureaucracy is 19th-century, of French origin.
=> pyre, pyrotechnic[bureau etymology, bureau origin, 英语词源]
bureau (n.)youdaoicibaDictYouDict
1690s, "desk with drawers, writing desk," from French bureau "office; desk, writing table," originally "cloth covering for a desk," from burel "coarse woolen cloth" (as a cover for writing desks), Old French diminutive of bure "dark brown cloth," which is perhaps either from Latin burrus "red," or from Late Latin burra "wool, shaggy garment." Offices being full of such desks, the meaning expanded 1720 to "division of a government." Meaning "chest of drawers" is from 1770, said to be American English but early in British use.