senseless

adjectives

not marked by the use of reason
"mindless violence"; "reasonless hostility"; "a senseless act"
mindless, reasonless, senseless
unresponsive to stimulation
"he lay insensible where he had fallen"; "drugged and senseless"
insensible, 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"
otiose, pointless, purposeless, senseless, superfluous, wasted
is derived from
senselessness
(of especially persons) lacking sense or understanding or judgment
nitwitted, senseless, soft-witted, witless