IPA: /ˈsʌltriːəst/
KK: /ˈsʌltriːɪst/
The most hot and humid, often making someone feel uncomfortable or causing a feeling of passion.
The sultriest day of the summer left everyone seeking shade and cool drinks.
Comparative: sultrier
Superlative: sultriest
Sultriest → It is formed from "sultry" (from Middle English *sultrie*, meaning oppressively hot or moist) and the superlative suffix "-est" (meaning most). The word "sultriest" means the most oppressively hot or humid.
Think of the word 'sultry' which describes a hot and humid atmosphere, and remember that 'sultriest' means the most extreme version of that heat.