IPA: /ˈbrɔːniɪst/
KK: /ˈbrɔːniɪst/
The strongest or most muscular person or thing.
He was the brawniest player on the team, easily lifting the heaviest weights.
Comparative: brawnier
Superlative: brawniest
Brawniest → It is formed from "brawny" (from Old English "bræwne", meaning strong or muscular) and the suffix "-est" (meaning the most). The word "brawniest" means the most strong or muscular among a group.
Think of someone who is the 'most strong' — 'brawny' means strong, and '-est' indicates the highest degree.