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