臼歯 きゅうし Also written うすば Meanings Noun molar (tooth); grinder; premolar Kanji 臼 mortar. Read as キュウ. 歯 tooth. Read as シ. Words containing 臼歯 大臼歯 (だいきゅうし) molar 小臼歯 (しょうきゅうし) premolar 前臼歯 (ぜんきゅうし) premolar And 2 more. Jinuma: Japanese Dictionary · Word lists