naughty person. Hebrew a man of Belial = a worthless person. Like Anglo-Saxon na (= no, or not) and wiht (= a thing) = a thing of naught: i.e. worthless.
wicked. Hebrew. 'aven.App-44.
froward = perverse. Same word as in Pro_4:24; Pro_11:20; Pro_17:20; Pro_22:5. Not the same as elsewhere in Proverbs.