détour

Détour comes from the Old French verb destorner — to turn away, to divert. Des- means away from, and torner means to turn (from Latin tornare, to turn on a lathe). A détour was any deviation from a straight course. In medieval French, the word applied to rivers that bent, roads that curved, and conversations that avoided the point.

English borrowed the word in the eighteenth century, initially keeping the French spelling and pronunciation. Early uses were military — armies on detour, supply lines rerouted. By the mid-1800s, the word had attached itself to road travel specifically. When a bridge washed out or a road was blocked, the alternative route was a detour. The word narrowed from any kind of turning to a specific kind of traffic management.

The rise of automobile travel in the twentieth century made 'detour' one of the most common road signs in America. Orange signs with black lettering appeared on highways from the 1920s onward. The word became so associated with inconvenience that it acquired a negative connotation it never had in French. In English, a detour is annoying. In French, a détour can be pleasant — a scenic alternative, a deliberate choice to avoid the direct route.

The French expression sans détour means 'without beating around the bush' — speaking directly, without conversational detours. English lost this figurative sense almost entirely. In English, detours happen on roads. In French, they happen in speech, in thought, in life. The word crossed the Channel and lost half its range.