The compound noun "straight-edge" is a transparent combination of two native English words. "Straight" originates from the Old English concept of being stretched taut, implying a line free from curves or deviations. "Edge" derives from the Old English word for the sharp side of a blade, which extended to mean any distinct boundary or line. When combined, the term literally describes a tool with a precise, uncurved boundary used for measurement or alignment. This literal meaning was later metaphorically adopted in the 1980s hardcore punk scene to describe a lifestyle adhering to a strict, "unbending" personal boundary of abstinence, mirroring the tool's defining characteristic of inflexible precision.

Structure: straight (sense) + edge (sense) straight: From Middle English streght, streyt, from Old English streht (past participle of streccan 'to stretch'), meaning 'not bent or curved'. Origin: Proto-Germanic. edge: From Middle English egge, from Old English ecg, meaning 'the sharp side of a blade' or 'a border'. Origin: Proto-Germanic.