Contradict
late 16th century: from Latin contradict- ‘spoken against’, from the verb contradicere, originally contra dicere ‘speak against’.
wiktionary
Borrowed from Latin contradict-, the participle stem of contrādīcō(“I speak against”) (originally two words).
etymonline
contradict (v.)
1570s, "speak against, oppose" (a sense now obsolete); 1580s, "assert the contrary or opposite of," from Latin contradictus, past participle of contradicere, in classical Latin contra dicere "to speak against," from contra "against" (see contra (prep., adv.)) + dicere "to say, speak" (from PIE root *deik- "to show," also "pronounce solemnly").
Meaning "deny the words or assertions of, speak in contradiction" is from c. 1600. Of statements, etc., "be inconsistent with," c. 1600. Related: Contradicted; contradicting; contradictive.
