muscly

• muscley

From muscle +‎ -ly.

muscly (comparative musclier, superlative muscliest)

1. thewy, muscled
   • 1879, Robert Browning, Dramatic Idyls:

     One whipcord nerve in the muscly mass from neck to shoulder-blade / Of the mountainous man...

2. (figuratively) Strong, powerful

• clumsy, cumyls