How to say "contradict" in Japanese

• 打ち消すうちけすJLPT N2approx.Common
  godan verb, transitive verbCovers 'contradict' in the sense of denying what someone has said, canceling a claim by asserting the opposite. It suggests an act of rebuttal directed at a statement or assertion, as when one witness's testimony contradicts another's.
• 反するはんするJLPT N1approx.Common
  suru verb (irregular), intransitive verbCovers 'contradict' in the sense of being inconsistent with or running counter to something, such as facts, logic, rules, or expectations. Here the subject conflicts with something rather than a speaker actively denying a claim, so it often describes statements or outcomes that contradict reason or expectation.
  お金かねを借かりる事ことは私の主義しゅぎに反はんする。↗

  It is against my principles to borrow money.

Use 「打ち消す」 for actively denying or contradicting a statement or claim, and 「反する」 for being contrary to or running counter to rules, expectations, or logic.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 打ち消すうちけすto deny
• 反するはんするto be contrary (to)
• 駁するばくするto oppose someone's opinion