Contradict

Verb

1. To deny the truth or validity of (a statement or statements).

   "His testimony contradicts hers."

2. To oppose (a person) by denying the truth or pertinence of a given statement.

   "Everything he says contradicts me."

3. To be contrary to (something).
4. To say things that conflict with each other.

   "The prime minister contradicted herself during her speech."

5. To give an order contrary to (another order or wish), oppose (something).