quick-witted

The compound "quick-witted" is a native English formation. The original sense of "quick" in Old English was "alive" or "living," which evolved to imply lively motion and, by extension, rapid mental activity. "Wit" derives from a common Germanic root for knowledge and intellect. When combined, the literal construction "having a lively mind" perfectly captures the modern abstract meaning of mental agility and sharpness. The term exemplifies how English can create vivid descriptive adjectives by pairing a quality of action ("quick") with a faculty of the mind ("wit").

Structure: quick (fast) + witted (having a mind or intellect) - quick: From Old English cwic (alive, living, animated). In this compound, it functions as an intensifier meaning "rapid, swift." - witted: From Old English witt (understanding, intellect, mind). The suffix -ed gives it the adjectival meaning "having or characterized by."