IPA: /ˈmʌsliɪst/
KK: /ˈmʌsliɪst/
Having well-defined muscles; the strongest or most muscular in a group.
He is the muscliest athlete on the team, winning many bodybuilding competitions.
Comparative: more muscly
Superlative: muscliest
Muscliest → It is formed from "muscle" (from Latin *musculus*, meaning little mouse, referring to the shape of muscles) and the suffix "-iest" (meaning most). The word "muscliest" means having the most muscle or being the most muscular.
Think of the word 'muscle' which refers to the tissue that helps you move, and remember that 'muscliest' means having the most of that tissue.