IPA: /ˈdraɪ.ɪst/
KK: /draɪɪst/
The state of having very little or no moisture; the most extreme form of being not wet.
This summer has been the driest on record, with almost no rain at all.
Comparative: drier
Superlative: dryest
Dryest → It is formed from "dry" (from Old English *drȳge*, meaning free from moisture) and the superlative suffix "-est" (meaning most). The word "dryest" means having the least moisture or being the most free from wetness.
Think of 'dry' meaning free from moisture, and '-est' indicating the most. So, 'dryest' means the most free from moisture.