tour
n.
c.1300, "a turn, a shift on duty," from Old French tor, tourn, tourn "a turn, trick, round, circuit, circumference," from torner, tourner "to turn" (see turn, v.). Sense of "a continued ramble or excursion" is from 1640s. Tour de France as a bicycle race is recorded in English from 1916 (Tour de France Cycliste), distinguished from a motorcar race of the same name. The Grand Tour, a journey through France, Germany, Switzerland, and Italy formerly was the finishing touch in the education of a gentleman.
v.
1746, "make a tour, travel about," from tour, n.. Related: Toured; touring.
词根：tour 迂回, 转
tour [‘迂回”而行，到处;转”游] 旅游，游历
tourism [见上，-ism名词后缀，表示行为] 旅游，导游业
tourist [见上，-ist人] 旅游者，游览者
detour [de-加强意义，tour迂回] 弯路，迂回路，绕道
contour [con-加强意义，tour迂回;’迂回”地面] 画轮廓，画外形，轮廓，外形
〔李〕[tour] n.漫游，游览； 旅行，参观 v.游览； 旅行，参观 ←tour (F tourner)=to turn 转动
〔蒋〕[‘迂回”而行，到处;转”游] 旅游，游历