archaic

/ɑrˈkeɪɪk/

adjective

Very old or old-fashioned.

prisons are run on archaic methods

obsolete,obsolescent,out of date,anachronistic,old-fashioned,outmoded,behind the times,bygone,antiquated,antique,superannuated,antediluvian,past its prime,having seen better days,olde worlde,old-fangled