spare > define

Refrain from harming.
- synonyms: save
Save or relieve from an experience or action.
- usage: "I'll spare you from having to apologize formally"
Give up what is not strictly needed.
- usage: "he asked if they could spare one of their horses to speed his journey"
- synonyms: give up, part with, dispense with
Use frugally or carefully.

Thin and fit.
- usage: "the spare figure of a marathon runner"; "a body kept trim by exercise"
- synonyms: trim
More than is needed, desired, or required.
- usage: "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"
- synonyms: excess, extra, redundant, supererogatory, superfluous, supernumerary, surplus
Not taken up by scheduled activities.
- usage: "a free hour between classes"; "spare time on my hands"
- synonyms: free
Kept in reserve especially for emergency use.
- usage: "a reserve supply of food"; "a spare tire"; "spare parts"
Lacking in amplitude or quantity.
- usage: "a bare livelihood"; "a scanty harvest"; "a spare diet"
- synonyms: bare, scanty
Lacking embellishment or ornamentation.
- usage: "a plain hair style"; "unembellished white walls"; "functional architecture featuring stark unornamented concrete"
- synonyms: plain, bare, unembellished, unornamented

(n.) Parsimony; frugal use.
(v.i.) To desist; to stop; to refrain.
(v.t.) Held in reserve, to be used in an emergency; as, a spare anchor; a spare bed or room.
(v.i.) To be frugal; not to be profuse; to live frugally; to be parsimonious.
(v.t.) Slow.
(v.t.) Being over and above what is necessary or what must be used or reserved; not wanted or not used; superfluous; as, I have no spare time.
(n.) The act of sparing; moderation; restraint.
(v.t.) Scanty; not abundant or plentiful; as, a spare diet.
(v.t.) Lean; wanting flesh; meager; thin; gaunt.
(a.) To save or gain, as by frugality; to reserve, as from some occupation, use or duty.
(a.) To keep to one's self; to forbear to impart or give.
(n.) That which has not been used or expended.
(a.) To preserve from danger or punishment; to forbear to punish, injure or harm; to show mercy to.
(a.) To deprive one's self of, as by being frugal; to do without; to dispense with; to give up; to part with.
(n.) An opening in a petticoat or gown; a placket.
(a.) To use frugally or stintingly, as that which is scarce or valuable; to retain or keep unused; to save.
(v.i.) To refrain from inflicting harm; to use mercy or forbearance.
(n.) The right of bowling again at a full set of pins, after having knocked all the pins down in less than three bowls. If all the pins are knocked down in one bowl it is a double spare; in two bowls, a single spare.
(v.t.) Sparing; frugal; parsimonious; chary.

by Webster's Revised Unabridged Dictionary