unconcerned

Etymology

From un- + concerned or unconcern + -ed.

adj

1. Indifferent and having no interest; aloof.
   You understand the things that I've taught you: not to drink alcohol, not to use drugs. Don't use that cocaine or marijuana, because that stuff is highly addictive. When people become weed-heads they become sluggish, lazy, stupid, and unconcerned. Sluggish, lazy, stupid, and unconcerned. That's all marijuana does to you, okay? 2016, Frank Ocean, “Be Yourself”, in Blonde
2. Not anxious, apprehensive, or worried.
   She is completely unconcerned about the upcoming exams.
3. Having no involvement.
   unconcerned in the business