Akademik

sinewy
adjective
1. (of meat) full of sinews; especially impossible to chew (Freq. 2)
Syn: ↑fibrous, ↑stringy, ↑unchewable
Similar to: ↑tough
2. consisting of tendons or resembling a tendon
Syn: ↑tendinous
Pertains to noun: ↑sinew, ↑tendon (for: ↑tendinous)
Derivationally related forms: ↑sinew, ↑tendon (for: ↑tendinous)
3. (of a person) possessing physical strength and weight; rugged and powerful
-

a hefty athlete

-

a muscular boxer

-

powerful arms

Syn: ↑brawny, ↑hefty, ↑muscular, ↑powerful
Similar to: ↑strong
Derivationally related forms:
sinew, ↑muscle (for: ↑muscular), ↑muscularity (for: ↑muscular), ↑heft (for: ↑hefty), ↑heftiness (for: ↑hefty), ↑brawn (for: ↑brawny), ↑brawniness (for: ↑brawny)

Useful english dictionary. 2012.