mindless

Adjective

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

• devoid of intelligence

• not mindful or attentive
  • while thus unmindful of his steps he stumbled- G.B.Shaw
    

• requiring little mental effort
  • mindless tasks
    

• lacking the thinking capacity characteristic of a conscious being
  • the shrieking of the mindless wind
    

Related words

• Synonyms: 
  reasonless , senseless , asinine , fatuous , inane , vacuous , unmindful , forgetful
• Antonyms: 
  mindful , aware