IPA: /ˈstaʊtɪst/
KK: /staʊtɪst/
The most strong and thick in build or body; often used to describe someone who is heavyset or robust.
He was the stoutest player on the team, known for his strength and endurance.
Comparative: stouter
Superlative: stoutest
Stoutest is formed from "stout" (from Old French *estout*, meaning brave or strong) and the suffix "-est" (indicating the superlative degree). The word "stoutest" means the most brave or strong among a group.
Think of 'stout' meaning strong or brave, and remember that 'stoutest' refers to the strongest or bravest of all.