IPA: /ˈhɒtɪst/
KK: /ˈhɑtɪst/
The highest temperature or degree of warmth.
Today is the hottest day of the year, reaching over 100 degrees Fahrenheit.
Comparative: hotter
Superlative: hottest
Hottest → It is formed from "hot" (from Old English *hat*, meaning having a high temperature) and the suffix "-est" (used to form the superlative degree). The word "hottest" means having the highest temperature among a group.
Think of 'hot' as having a high temperature, and remember that 'hottest' means the one with the highest temperature.