UNCONCERN'ED, adjective 1. Not concerned; not anxious; feeling no solicitude. He is unconcerned at what has happened. He is unconcerned about or for the future. Happy mortals, unconcerned for more. [It has at sometimes before a past event, but about or for is more generally used before a past or future event.] 2. Having no interest in. He is unconcerned in the events of the day.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI