hardener
nounUS /ˈhɑɹdn̩ɚ/ · UK /ˈhɑːdn̩ə/
Etymology From harden + -er.
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.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.