An Etymological Dictionary of Astronomy and Astrophysics

1. To bring back into existence, use, or the like; reestablish.
   

2. To bring back to a former, original, or normal condition, as a building, statue, or painting (Dictionary.com).

Etymology (EN): M.E., from O.Fr. restorer, from L. restaurare “repair, rebuild, renew,” from → re- “back, again” + -staurare, from PIE root *sta- “to stand, set down, make or be firm,” → state.

Etymology (PE): Bâzsâxtan, from bâz- “back, again,” → re-, + sâxtan “to build, make, fashion; to adapt, adjust, be fit” (from
Mid.Pers. sâxtan, sâz-, Manichean Parthian s’c’dn “to prepare, to form;” Av. sak- “to understand, to mark,” sâcaya- (causative) “to teach”).
Bâzgardândan, from bâz-+ gardândan “to turn (around),” accusative of gardidan, gaštan “to change, to turn, → revolve.”