(a.) Insane; mad; of unsound mind\.

abnormal bereft of reason brainsick crackbrained cracked crazed crazy daft delirious deluded deprived of reason deranged disoriented distraught flighty frenzied hallucinated hysterical insane irrational loco lunatic mad maddened maniac manic mazed mental mentally deficient meshuggah moon-struck non compos non compos mentis not all there not right odd of unsound mind off psycho queer reasonless senseless sick stark-mad stark-staring mad strange tetched touched unbalanced unhinged unsane unsettled unsound wandering witless