franc-tireur (n.)youdaoicibaDictYouDict[franc-tireur 词源字典]
"sharpshooter of the irregular infantry," 1808, French, literally "free-shooter," from franc "free" (see frank (adj.)) + tireur "shooter," from tirer "to draw, shoot" (see tirade). A term from the French Revolution.[franc-tireur etymology, franc-tireur origin, 英语词源]