senseless

adjective4

1. •
   Without feeling or desire to work; deprived of sensation.

   • The blow to his head rendered him senseless; he didn’t awaken until he was in the ambulance.
2. •
   Lacking meaning or purpose; without common sense.

   • What a senseless waste of money.
3. •
   Without a discernible meaning or purpose, especially of a violent or evil act.

   • The school shooting was a senseless act of violence.
4. •
   Without consideration, awareness or sound judgement

   • He took senseless risks, not even aware of the danger he was in.