once-over

The compound noun "once-over" is a 20th-century American colloquialism formed from the common adverbial phrase "once over." The phrase itself is a straightforward combination of "once," meaning a single time, and "over," implying a movement from beginning to end across a surface or subject. The literal sense of "a single pass across something" evolved naturally into the modern figurative meaning of a quick and cursory inspection or look. This evolution reflects a logical metaphorical extension where a rapid visual scan is conceptualized as a single, sweeping motion.

Structure: once (one time) + over (across) - once: From Old English ānes, genitive of ān (one), used to form an adverb meaning "one time." Functional role: Adverbial element indicating a single instance. - over: From Old English ofer, meaning "above, across, beyond." Functional role: Prepositional element indicating movement or coverage.