言いい違ちがえるいいちがえるConjugationMeanings1ichidan verb, transitive verbsay by mistake; make a slip of the tongueUsed when someone accidentally says the wrong word or phrase.緊きん張ちょうして、名な前まえを言いい違ちがえてしまった。I was nervous and said the wrong name by mistake.彼かれはよく言こと葉ばを言いい違