witless

adjective3

1. •
   Lacking wit or understanding; foolish.

   • Then will we march to all those Indian Mines, My witlesse brother to the Christians lost: And ransome them with fame and vsurie. — 1587
2. •
   Indiscreet; not using clear and sound judgment.
3. •
   Mindless, lacking conscious thought or the capacity for it.

   • Rage warps my clearest cry To witless agony. — 1941