mindless

Etymology

From Middle English myndles, myndelees, myndeles, mendlees, from Old English myndlēas, ġemyndlēas (“foolish, senseless”), equivalent to mind + -less.

adj

1. Showing a lack of forethought or sense.
2. Having no sensible meaning or purpose.
   An act of mindless violence.
   “I Love Lisa” opens with one of my favorite underappreciated running jokes from The Simpsons: the passive-aggressive, quietly contentious relationship of radio jocks Bill and Marty, whose mindless happy talk regularly gives way to charged exchanges that betray the simmering resentment and disappointment perpetually lingering just under the surface of their relationship. August 5, 2012, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “I Love Lisa” (season 4, episode 15; originally aired 02/11/1993)”, in (Please provide the book title or journal name)
3. Heedless.
4. (of a thing done) Overly repetitive and unchallenging.
5. Lacking a mind.
   Atheism alleges that mindless scientific forces control the universe.