restore (v.)

c. 1300, restoren, "to give back," also, "to build up again, repair; renew, re-establish; free from the effects of sin; bring back to a former and better state," from Old French restorer, from Latin restaurare "repair, rebuild, renew." This is from re- "back, again" (see re-) + -staurare, not attested by itself but also in instaurare "to set up, establish; renew, restore," etc.,  from PIE root *sta- "to stand, make or be firm."

From late 14c. as "to cure, heal, bring back to a vigorous state;" of objects, beliefs, etc., "bring back to an original state or condition," 1670s. Related: Restored; restoring.

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Definitions of restore from WordNet

restore (v.)
return to its original or usable and functioning condition;
restore the forest to its original pristine condition
Synonyms: reconstruct
restore (v.)
return to life; get or give new life or energy;
The week at the spa restored me
Synonyms: regenerate / rejuvenate
restore (v.)
give or bring back;
Synonyms: restitute
restore (v.)
restore by replacing a part or putting together what is torn or broken;
Synonyms: repair / mend / fix / bushel / doctor / furbish up / touch on
restore (v.)
bring back into original existence, use, function, or position;
restore law and order
restore the emperor to the throne
Synonyms: reinstate / reestablish