mindless, reasonless, senseless -- (not marked by the use of reason; "mindless violence"; "reasonless hostility"; "a senseless act")
insensible, senseless -- (unresponsive to stimulation; "he lay insensible where he had fallen"; "drugged and senseless")
otiose, pointless, purposeless, senseless, superfluous, wasted -- (serving no useful purpose; having no excuse for being; "otiose lines in a play"; "advice is wasted words"; "a pointless remark"; "a life essentially purposeless"; "senseless violence")
nitwitted, senseless, soft-witted, witless -- ((of especially persons) lacking sense or understanding or judgment)
(Sound)
