senseless

not marked by the use of reason; "mindless violence"; "reasonless hostility"; "a senseless act"

unresponsive to stimulation; "he lay insensible where he had fallen"; "drugged and senseless"

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"

(of especially persons) lacking sense or understanding or judgment