IPA: /ˈsʌltriər/
KK: /ˈsʌltriər/
More hot and humid than usual, often in a way that feels uncomfortable or oppressive.
The sultrier days of summer make it hard to enjoy outdoor activities.
Comparative: sultrier
Superlative: sultriest
Sultrier → It is formed from "sultry" (from Middle English *sultrie*, meaning oppressively hot or humid) and the comparative suffix "-er" (meaning more). The word "sultrier" means more sultry or more oppressively hot and humid.
Think of the word 'sultry' which describes a hot and humid atmosphere, and remember that 'sultrier' means even more so.