brigand (n.)youdaoicibaDictYouDict[brigand 词源字典]
c. 1400, "lightly armed foot soldier," from Old French brigand (14c.), from Italian brigante "trooper, skirmisher, foot soldier," from brigare (see brigade). Sense of "one who lives by pillaging" is from early 15c., reflecting the lack of distinction between professional mercenary armies and armed, organized criminals.[brigand etymology, brigand origin, 英语词源]