酸さん化か還かん元げん反はん応のうMeaningsNoun1. oxidation-reduction reaction; redox reactionKanji used酸acid化transformation還finally return元origin反be against応respond with actionPitch accentさんかかんげんはんのうComposed of酸さん化かoxidation; oxidizationNoun還かん元げんrestoration; return; reduction; resolution; deoxidization; deoxidationNoun反はん応のうreaction; response; physical reaction (to a stimulus); observable response (of an organism); effect; changeNoun