late 14c., earlier salue (c.1300), from L. salutare "to greet," lit. "wish health to," from salus (gen. salutis) "greeting, good health," related to salvus "safe" (see safe). The noun is attested from c.1400 as an utterance, gesture, or action of any kind. The military and nautical sense of "display flags, fire cannons, etc., as a mark of respect" is recorded from 1580s (the noun in this sense is from 1690s); sense of raising the hand to the cap in the presence of a superior officer is from 1832 (n.), 1844 (v.).
1640s, "payment for saving a ship from wreck or capture," from Fr. salvage, from O.Fr. salver "to save" (see save). The general sense of "the saving of property from danger" is attested from 1878. Meaning "recycling of waste material" is from 1918, from the British effort in World War I. The verb is 1889, from the noun.
salvaging.salvageable by 1915, from salvage + -able.salvation early 13c., originally in the Christian sense, from O.Fr. salvaciun, from L.L. salvationem (nom. salvatio, a Church Latin translation of Gk. soteria), noun of action from salvare "to save" (see save). In general (non-religious) sense, attested from late 14c. Meaning "source of salvation" is from late 14c. Salvation Army is from 1878, founded by the Rev. William Booth. The verb salve "to save from loss at sea" (1706) is a back-formation.
(n.) O.E. sealf "healing ointment," from W.Gmc. *salbo- "oily substance" (cf. O.S. salba, M.Du. salve, Du. zalf, O.H.G. salba, Ger. salbe "ointment"), from PIE *solpa-, from base *selp- "fat, butter" (cf. Gk. elpos "fat, oil," Skt. sarpis "melted butter"). The figurative sense of "something to soothe wounded pride, etc." is from 1736. The verb is O.E. sealfian "anoint (a wound) with salve," from P.Gmc. *salbojanan (cf. Du. zalven, Ger. salben, Goth. salbon "to anoint").