IPA: /ˈkʌmfiər/
KK: /ˈkʌmfiər/
More comfortable than something else.
This chair is comfier than the old one.
Comfier → It is formed from "comfy" (a colloquial shortening of "comfortable", which comes from Latin "comfortare", meaning to strengthen or make strong) and the comparative suffix "-er" (meaning more). The word "comfier" means more comfortable or providing greater comfort.
Think of 'comfortable' and remember that 'comfier' means more comfortable.