hardener
(noun)
noun
1. One who, or that which, hardens.
- the hardener of hearts
2. A chemical substance added to something in order to harden it; used especially with paints, varnishes and resins.
(noun)
1. One who, or that which, hardens.
- the hardener of hearts
2. A chemical substance added to something in order to harden it; used especially with paints, varnishes and resins.