full-swing

The compound 'full-swing' is a relatively modern formation, emerging in the 19th century from the metaphorical use of the noun 'swing'. The core concept derives from the physical motion of swinging, which implies momentum, force, and a peak arc of movement. By prefixing it with 'full', the term intensifies this image to signify the point of maximum momentum or activity. Thus, the literal idea of a pendulum or object moving at the peak of its arc evolved into the abstract meaning describing any process or event at its most active or intense phase.

Structure: full (complete) + swing (vigorous motion) - full: From Old English 'full', meaning 'complete, entire, abundant'. It functions as an intensifier in the compound. - swing: From Old English 'swingan', meaning 'to beat, fling oneself, rush'. In this compound, it denotes a state of vigorous, unchecked activity or motion.