止痛剤 しつうざい Meanings Noun analgesic; painkiller; sedative; tranquilizer (tranquiliser); anodyne See also: 鎮痛剤 (ちんつうざい). Kanji 止 stop. Read as シ. 痛 pain. Read as ツウ. 剤 agent. Read as ザイ. Jinuma: Japanese Dictionary · Word lists