1690s, "free to move the feet, unshackled," from foot (n.) + loose (adj.). Figurative sense of "free to act as one pleases" is from 1873.
Americans have always been a footloose people always moving on
a footloose young man eager to see the big city
footing
footle
footless
footlights
foot-locker
footloose
footman
footnote
footpad
foot-path
footprint