senseless (
http://definr.com/senseless)
adj 1: not marked by the use of reason; "mindless violence";
"reasonless hostility"; "a senseless act" [syn:
mindless,
reasonless]
2: unresponsive to stimulation; "he lay insensible where he had
fallen"; "drugged and senseless" [syn:
insensible]
3: lacking import; "a pointless remark"; "a life essentially
purposeless"; "senseless violence" [syn:
pointless,
purposeless]
4: (of especially persons) lacking sense or understanding or
judgment [syn:
nitwitted,
soft-witted,
witless]