"the spare figure of a marathon runner"
"a body kept trim by exercise"

"trying to lose excess weight"
"found some extra change lying on the dresser"
"yet another book on heraldry might be thought redundant"
"skills made redundant by technological advance"
"sleeping in the spare room"
"supernumerary ornamentation"
"it was supererogatory of her to gloat"
"delete superfluous (or unnecessary) words"
"extra ribs as well as other supernumerary internal parts"
"surplus cheese distributed to the needy"

"a free hour between classes"
"spare time on my hands"

"a reserve supply of food"
"a spare tire"
"spare parts"

"a bare livelihood"
"a scanty harvest"
"a spare diet"

"a plain hair style"
"unembellished white walls"
"functional architecture featuring stark unornamented concrete"

"I'll spare you from having to apologize formally"

"he asked if they could spare one of their horses to speed his journey"