防止剤 ぼうしざい Meanings Noun inhibitor; prevention agent Kanji 防 defend. Read as ボウ. 止 stop 剤 agent. Read as ザイ. Words containing 防止剤 酸化防止剤 (さんかぼうしざい) antioxidant 凍結防止剤 (とうけつぼうしざい) (automotive) antifreeze 老化防止剤 (ろうかぼうしざい) age resister And 1 more. Jinuma: Japanese Dictionary · Word lists