Contravene

Part of speech: verb (v.)

1. To meet in the way of opposition; to come into conflict with; to oppose; to contradict; to obstruct the operation of; to defeat. So plain a proposition . . . was not likely to be contravened. Southey.

2. To violate; to nullify; to be inconsistent with; as, to contravene a law. Laws that place the subjects in such a state contravene the first principles of the compact of authority. Johnson.

Synonyms: contradict; set aside; nullify; defeat; cross; obstruct; baffle; thwart.