Answer: stupidly

AnswerCrossword Clue
STUPIDLYLike a ninny.
STUPIDLYWitlessly.
STUPIDLYIn a thickheaded way
STUPIDLYIn an inane manner
STUPIDLYIn a dumb manner
STUPIDLYIn a dumb (and dumber) way
stupidlyslow of mind obtuse
stupidlySTUPID, mentally slow