ぎゃくこうか 逆効果 Common word Wanikani level 28 Play audio LinksSentence search for 逆効果Sentence search for ぎゃくこうかSentence search for ぎゃっこうかKanji details for 逆, 効 and 果Edit in JMdict Noun1. opposite effect; adverse effect; backfiringOther forms逆効果 【ぎゃっこうか】 Discussions Log in to talk about this word.