Origin: 1225–75; Middle English < Old French hostage (h- by association with (h)ostehost2), ostage ≪ Vulgar Latin *obsidāticum state of being a hostage < Latin obsid- (stem of obses) hostage (equivalent to ob-ob- + sid-sit) + -āticum-age
c.1275, from O.Fr. hostage "person given as security or hostage," either from hoste "guest" (see host (1)) via notion of "a lodger held by a landlord as security," or from L.L. obsidanus "condition of being held as security," from obses "hostage," from ob- "before" + base of