爪の垢 つめのあか Meanings Expression, Noun dirt under one's fingernails shred (of decency, etc.); scrap; bit; smidgen Kanji 爪 nail. Read as つめ. 垢 grime. Read as あか. Words containing 爪の垢 爪の垢を煎じて飲む (つめのあかをせんじてのむ) to take a lesson from (someone serving as an example) Jinuma: Japanese Dictionary · Word lists