late 13c., "a base, foundation;" late 14c., "position of the feet on the ground, stance," a gerundive formation from foot (n.). Figurative meaning "firm or secure position" is from 1580s; that of "condition on which anything is established" is from 1650s.
on a friendly footing
they were on a friendly footing
footer
footfall
foot-hill
foot-hills
foothold
footing
footle
footless
footlights
foot-locker
footloose