contradictor

transitive verb

1. 1. to assert the opposite of (what someone else has said)
   2. to deny the statement of (a person)
2. to declare (a statement, report, etc.) to be false or incorrect
3. to be contrary or opposed to; go against the facts contradict his theory

Etymology: < L contradictus, pp. of contradicere < contra-, contra- + dicere, to speak: see diction

intransitive verb