Vocabulary What does 二割 (にわり, niwari) mean? 二割 (にわり, niwari) means 20 percent. Quick factsReadingにわりRomajiniwariPart of speechnoun 二割にわりniwari20 percent1noun 20 percentAlso written: 2割Kanji in this word二two; the number 2割divide, cut; ratio