むがい 無害 Common word Wanikani level 20 Play audio LinksSentence search for 無害Sentence search for むがいKanji details for 無 and 害Edit in JMdict Na-adjective (keiyodoshi), Noun which may take the genitive case particle 'no', Noun1. harmlessAntonym: 有害 ゆうがい Discussions Log in to talk about this word.