routyoudaoicibaDictYouDict[rout 词源字典]
rout: English has two words rout. ‘Disorderly retreat’ [16] comes via archaic French route ‘dispersed group’ and Italian rotta ‘breakage’ from Vulgar Latin *rupta, a noun use of the past participle of Latin rumpere ‘break’ (source of English corrupt, disrupt [17], erupt, and rupture and related to English rob). Other English descendants of *rupta are route, routine, and rut. Rout ‘dig with the nose’, hence ‘search, rummage’ [16] is a variant form of root.
=> corrupt, disrupt, erupt, rob, robe, route, routine, rupture, rut; root[rout etymology, rout origin, 英语词源]
rout (n.)youdaoicibaDictYouDict
1590s, "disorderly retreat following a defeat," from Middle French route "disorderly flight of troops," literally "a breaking off, rupture," from Vulgar Latin rupta "a dispersed group," literally "a broken group," from noun use of Latin rupta, fem. past participle of rumpere "to break" (see rupture (n.)).

The archaic English noun rout "group of persons, assemblage," is the same word, from Anglo-French rute, Old French route "host, troop, crowd," from Vulgar Latin rupta "a dispersed group," here with sense of "a division, a detachment." It first came to English meaning "group of soldiers" (early 13c.), also "gang of outlaws or rioters, mob" (c. 1300) before the more general sense developed 14c. Also as a legal term. A rout-cake (1807) was one baked for use at a reception.
rout (v.)youdaoicibaDictYouDict
"drive into disordered flight by defeat," c. 1600, from rout (n.). Related: Routed; routing.