むしば 虫歯 Common word JLPT N3 Wanikani level 12 Play audio LinksSentence search for 虫歯Sentence search for むしばSentence search for むし歯Sentence search for 齲歯Kanji details for 虫 and 歯Edit in JMdict Noun1. tooth decay; cavity; decayed tooth; dental cariesOther formsむし歯 【むしば】、齲歯 【むしば】Notes齲歯: Rarely-used kanji form. Discussions Log in to talk about this word.