IPA: /brɪskɪst/
KK: /brɪskɪst/
The most energetic or quick in movement or action.
The briskest walk in the park is refreshing on a cool morning.
Comparative: brisker
Superlative: briskest
Briskest is formed from "brisk" (from Middle English "bruske", meaning lively or active) and the superlative suffix "-est" (meaning most). The word "briskest" means the most lively or active.
Think of someone being the 'most lively' or 'active' — that's what 'briskest' means.