Vocabulary What does 入れ歯 (いれば, ireba) mean? 入れ歯 (いれば, ireba) means false tooth; denture. Quick factsReadingいればRomajiirebaPart of speechnoun 入れ歯いればirebafalse tooth; denture1noun false tooth; dentureAlso written: 入歯Kanji in this word入to enter, to go in歯tooth