Added 10 October 2026 brainsick adjective Categories: Describing WordsObscure Words adjective ! Definition from WordNet 3.1, Princeton University. More about brainsick at Wordnik → Where our words come from → Affected with madness or insanity. a man who had gone mad Origin From brain + sick. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: unhingedinsanedementedcrazymadsickdistracteddisturbedunbalancedgiddy-brainedblickedmadbrained Back to today's word