Answer: insaner

AnswerCrossword Clue
INSANERMore harebrained
INSANERMore nutty
INSANERMore cracked
INSANERMore mad
INSANERMore out of one's gourd
INSANERMore nuts
insanervery foolish
insanermentally deranged
insanerINSANE, mentally unsound