IPA: /ˈwɔːrmɪst/
KK: /wɔrmɪst/
The highest degree of warmth; having the most heat compared to others.
Today is the warmest day of the year so far.
Comparative: warmer
Superlative: warmest
Warmest → It is formed from "warm" (from Old English *wearm*, meaning having a moderate degree of heat) and "-est" (a superlative suffix indicating the highest degree). The word "warmest" means having the highest degree of warmth.
Think of 'warm' as having a moderate heat, and when you add '-est', it indicates the highest level of that heat — that's why warmest means the most warm.