off-track

The compound adjective "off-track" is a relatively modern formation, combining two English words of Germanic and Romance origin. "Off" is a core directional adverb from Old English, maintaining its sense of deviation or separation. "Track" entered English via French, with its origins likely in Germanic languages, referring to a beaten path or course. The literal sense, describing a train that has left its rails, logically extends to the figurative meaning of any project, thought, or person deviating from the intended or standard path. This evolution showcases how concrete physical descriptions ("off the rails") are readily applied to abstract concepts of plans and behavior going awry.

Structure: off (away from) + track (path) off: Old English, preposition/adverb meaning "away, away from." track: Middle English, from Old French trac, meaning "path, course, trail."