Someone who is sinewy has a lean body with strong muscles.
例句
A short, sinewy young man...一名个子不高、肌肉发达的年轻男子When muscles are exercised often and properly, they keep the arms firm and sinewy.如果能经常正确地锻炼肌肉的话,双臂就会一直结实而强健。
英汉词典释义
adj.
(多)肌腱的
a sinewy cut of beef.一块多筋牛肉
有力的
sinewy prose.强劲有力的散文
英英词典释义
Adjective
1. (of meat) full of sinews; especially impossible to chew
2. consisting of tendons or resembling a tendon
3. (of a person) possessing physical strength and weight; rugged and powerful;
"a hefty athlete""a muscular boxer""powerful arms"