An Etymological Dictionary of Astronomy and Astrophysics

1. To rescue from danger or possible harm, injury, or loss.
   

   2. To keep safe, intact, or unhurt; safeguard; preserve.
      

   3. Computers: To copy (a file) from RAM onto a disk or other storage medium (Dictionary.com).

Etymology (EN): M.E. sa(u)ven, from O.Fr. sauver “keep (safe), protect, redeem,” from L.L. salvare “make safe, secure,” from L. salvus “safe;” ultimately from PIE root *sol- “whole,” → general.

Etymology (PE): Bužidan, variants
buxtan, boxtan “to save, liberate;” boxt “saved, redeemed;” Mid.Pers. bôz- “to free, to release;” Bactrian βoγ “to save;” Av. bûj- “to save, redeem;” cf. Baluci bôtk / bôj “to open”, butk / busk “to be released (from jail), be fired (a gun), be emptied;” Pers.

buzidan/buz- “to pluck off hair, wool;”

cf. Gk. phugo, L. fugio “I flee”, Goth. us-baugjan “to wipe off” (Cheung 2007).