IPA: /səˈpɒnɪfaɪə/
KK: /səˈpɒnɪfaɪər/
A substance that helps to turn fats or oils into soap through a chemical process.
The chemist used a saponifier to create soap from the oils.
Saponifier → It is formed from "sapo" (from Latin, meaning soap) and "-fier" (from Latin "facere", meaning to make or do). The word "saponifier" refers to a substance that makes or produces soap.
Think of 'sapo' meaning soap and '-fier' meaning to make — a saponifier is something that makes soap.