IPA: /ˈkʌmfiəst/
KK: /ˈkʌmfiɪst/
The most comfortable; providing the greatest ease and relaxation.
This chair is the comfiest seat in the house.
Comparative: comfier
Superlative: comfiest
Comfiest → It is formed from "comfy" (a colloquial shortening of "comfortable", which comes from Latin "comfortare", meaning to strengthen or soothe) and the superlative suffix "-est" (meaning most). The word "comfiest" means the most comfortable or the one that provides the greatest comfort.
Think of 'comfortable' and remember that 'comfiest' means the most comfortable.