IPA: /ˈmʌsli/
KK: /ˈmʌsli/
Having well-defined muscles; strong and fit in appearance.
He has a muscly build from years of weightlifting.
Muscly → It is formed from "muscle" (from Latin *musculus*, meaning little mouse, referring to the shape of muscles) and the suffix "-y" (meaning characterized by). The word "muscly" describes someone or something characterized by well-defined muscles.
Think of 'muscle' which refers to the tissue that helps you move, and remember that 'muscly' means having well-defined muscles.