spare

an extra component of a machine or other apparatus

an extra car wheel and tire for a four-wheel vehicle

a score in tenpins; knocking down all ten after rolling two balls

refrain from harming

save or relieve from an experience or action; "I'll spare you from having to apologize formally"

give up what is not strictly needed; "he asked if they could spare one of their horses to speed his journey"

use frugally or carefully

thin and fit; "the spare figure of a marathon runner"; "a body kept trim by exercise"

more than is needed, desired, or required; "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"

not taken up by scheduled activities; "a free hour between classes"; "spare time on my hands"

kept in reserve especially for emergency use; "a reserve supply of food"; "a spare tire"; "spare parts"

lacking in amplitude or quantity; "a bare livelihood"; "a scanty harvest"; "a spare diet"

lacking embellishment or ornamentation; "a plain hair style"; "unembellished white walls"; "functional architecture featuring stark unornamented concrete"