IPA: /ˈɡlɒsiə/
KK: /ˈɡlɑːsiər/
Having a shiny or smooth surface that reflects light.
The new car has a glossier finish than the old model.
Glossier → It is formed from "gloss" (from Old French *glosse*, meaning shine or luster) and "-ier" (a suffix used to form adjectives indicating a comparative degree). The word "glossier" means having more shine or luster compared to something else.
Think of 'gloss' meaning shine, and remember that 'glossier' means having more shine than something else.