熱ねつ硬こう化か剤ざいMeaningsNoun1. hardener (catalyst in hardening thermosetting materials)Kanji used熱heat硬hard like a rock化transformation剤chemical substanceComposed of熱ねつheat; fever; temperature; zeal; passion; enthusiasm; mania; craze; rageNoun硬こう化かhardening; vulcanization; vulcanisation; sclerosis; curing; hardening (of attitude, stance, etc.); stiffening; toughening; upturn (in the market); firming upNoun剤ざいmedicine; agent; (chemical) substance; drug; doseSuffix