Word Origin & History
jail
c.1275, gayhol, from O.N.Fr. gaiole and O.Fr. jaole, both meaning "a cage, prison," from M.L. gabiola, from L.L. caveola, dim. of L. cavea "cage." Both forms carried into M.E.; now pronounced "jail" however it is spelled. Norman-derived gaol (preferred in Britain) is "chiefly due to statutory and official tradition" [OED]. The verb "to put in jail" is from 1604. Jailbird is 1603, an allusion to a caged bird. Jail-break "prison escape" is from 1910. Jail bait "girl under the legal age of consent" is attested from 1934.