IPA: /ˈfɔːrtɪfaɪər/
KK: /ˈfɔrtɪˌfaɪər/
A person or thing that strengthens or reinforces something, often used in the context of food or structures.
The fortifier added essential nutrients to the food to make it healthier.
Fortifier → It is formed from "fortis" (meaning strong) and "-ficare" (meaning to make). The word "fortifier" means to make something strong or to strengthen.
Think of making something 'strong' ('fortis') — that's why a fortifier is something that strengthens.