fleet-footed

the compound 'fleet-footed' marries two old english roots to create a vivid descriptor of agility. the first element, 'fleet', originally meant 'to float or swim', a sense preserved in the modern 'fleet of ships'. from the smooth, swift motion of water, it evolved to denote general swiftness and lightness of movement. combined with 'footed', meaning 'having feet', the term literally constructs the image of 'having swift feet', perfectly capturing its modern meaning of being able to move with rapid, nimble steps.

Structure: fleet (fast) + footed (having feet) fleet (from old english flēotan 'to float, swim', later developing the sense 'swift, nimble'; functional role: adjective root conveying speed). footed (from old english fōt 'foot' + the suffix -ed; functional role: adjective-forming suffix meaning 'having (a specified kind of) feet').