use one thing for many purposes / work someone hard

to use one's head

(idiomatic) to be at a loss

(obsolete) later, afterwards, some time after the present

counter for pairs of socks, shoes, etc

foot / enough, sufficient / satisfy, fulfill

subsequently, afterwards

(spatially) the back, the rear, behind / (temporally) later, afterwards, some time after the present / the rest

behind, after

one's backside / the back, the rear (both spatially and temporally)