The Collaborative International Dictionary of English v.0.48:
Spare \Spare\, v. t. [imp. & p. p. Spared; p. pr. & vb. n.
Sparing.] [AS. sparian, fr. spaer spare, sparing, saving;
akin to D. & G. sparen, OHG. spar?n, Icel. & Sw. spara, Dan.
spare See Spare, a.]
1. To use frugally or stintingly, as that which is scarce or
valuable; to retain or keep unused; to save. "No cost
would he spare." --Chaucer.
[Thou] thy Father's dreadful thunder didst not
He that hath knowledge, spareth his words. --Prov.
2. To keep to one's self; to forbear to impart or give.
Be pleased your plitics to spare. --Dryden.
Spare my sight the pain
Of seeing what a world of tears it costs you.
3. To preserve from danger or punishment; to forbear to
punish, injure, or harm; to show mercy to.
Spare us, good Lord. --Book of
Dim sadness did not spare
That time celestial visages. --Milton.
Man alone can whom he conquers spare. --Waller.
4. To save or gain, as by frugality; to reserve, as from some
occupation, use, or duty.
All the time he could spare from the necessary cares
of his weighty charge, he ?estowed on . . . serving
of God. --Knolles.
5. To deprive one's self of, as by being frugal; to do
without; to dispense with; to give up; to part with.
Where angry Jove did never spare
One breath of kind and temperate air. --Roscommon.
I could have better spared a better man. --Shak.
To spare one's self.
(a) To act with reserve. [Obs.]
Her thought that a lady should her spare.
(b) To save one's self labor, punishment, or blame.
Moby Thesaurus II by Grady Ward, 1.0:
49 Moby Thesaurus words for "spared":
absolved, acquitted, blotted, canceled, chartered, condoned,
conserved, disregarded, excepted, exculpated, excused, exempt,
exempted, exonerated, favored, forgiven, forgotten, immune,
indulged, intact, irresponsible, kept, let off, licensed,
overlooked, pardoned, permitted, preserved, privileged, protected,
redeemed, released, remitted, reprieved, saved, shriven,
unaccountable, unanswerable, unavenged, uncondemned, undamaged,
unliable, unresented, unrevenged, unspoiled, unsubject, untainted,
well-conserved, wiped away