IPA: /ˈaɪsiɪst/
KK: /ˈaɪsiɪst/
The most cold or frigid; having a very low temperature.
The iciest day of the year was when the lake froze over completely.
Comparative: icier
Superlative: iciest
Iciest → It is formed from "ice" (from Old English "is", meaning frozen water) and the suffix "-est" (meaning the most). The word "iciest" means the most icy or having the lowest temperature.
Think of 'ice' as the frozen water, and remember that 'iciest' means the most icy or the coldest.