IPA: /ˈwɪntri.ɪst/
KK: /ˈwɪntriɪst/
The coldest or most winter-like in character or appearance.
This year, the wintriest weather has made it difficult to travel.
Comparative: wintrier
Superlative: wintriest
Wintriest → It is formed from "winter" (from Old English *winter*, meaning the coldest season of the year) and "-iest" (a superlative suffix meaning most). The word "wintriest" means the most winter-like or the coldest in terms of winter characteristics.
Think of the word 'winter' to remember that 'wintriest' describes the most winter-like conditions.