drug-free

The compound adjective "drug-free" is a modern formation following a productive English pattern of combining a noun with the adjective "free" to denote the absence of something. The noun "drug" has a long history, entering English via French with a primary sense of a medicinal ingredient, a meaning that narrowed over time to often specify narcotics or controlled substances. The combining form "free," derived from an ancient root meaning "beloved" which evolved to signify liberty and exemption, is here used in its secondary sense of "devoid of." Thus, the literal construction "free from drugs" logically yields the modern meanings describing either a person's lifestyle choice or a substance's purity.

Structure: drug (substance) + free (without) - drug: From Middle English 'drogge', likely from Old French 'drogue', of uncertain ultimate origin, possibly from a Low German or Dutch word for 'dry'. Functions as the base noun denoting a medicinal or psychoactive substance. - free: From Old English 'frēo' (not in bondage, exempt from), from Proto-Germanic frijaz, from Proto-Indo-European priHós (dear, beloved). Functions as a combining form meaning "without," "lacking," or "exempt from."