willfully determined or disposed to go counter to what is expected or desired; contrary.

characterized by or proceeding from such a determination or disposition

a perverse mood.

wayward or cantankerous.

persistent or obstinate in what is wrong.

turned away from or rejecting what is right, good, or proper; wicked or corrupt.

noun

bullheadedness , doggedness , hardheadedness , mulishness , obstinateness , pertinaciousness , pertinacity , perversity , pigheadedness , tenaciousness , tenacity , willfulness