obstinate in opposing what is right, reasonable, or accepted; wrongheaded
Some husbands are imperious, and some wives perverse — Dr Johnson
arising from or indicative of stubbornness or obstinacy
unreasonably opposed to the wishes of others; uncooperative, contrary
in law, being contrary to the evidence or to the direction of the judge on a point of law
a perverse verdict
perversely adv
perverseness noun
perversity noun
[Middle English from Latin perversus, past part. of pervertere: see pervert1]