IPA: //ˈbrɪskər//
KK: /brɪskər/
More lively or energetic than something else.
The weather was brisker in the morning, making it perfect for a run.
Comparative: brisker
Superlative: briskest
Brisker is formed from "brisk" (from Middle English "bruske", meaning lively or active) and the comparative suffix "-er" (meaning more). The word "brisker" means more lively or more active than something else.
Think of someone being 'more lively' or 'more active' — that's what 'brisker' means.