剤 ざい Meanings Noun suffix medicine; agent; (chemical) substance; drug; dose Kanji 剤 agent. Read as ザイ. Example sentences アスピリン、ペニシリン、サルファ剤にアレルギーです。I am allergic to aspirin, penicillin, and sulfa drugs. Words containing 剤 洗剤 (せんざい) detergent 薬剤 (やくざい) medicine 眠剤 (みんざい) sleeping pills And 331 more. Word lists Core 5000 Spoken Written Encyclopedia Jinuma: Japanese Dictionary · Word lists