muscle
US /ˈmʌs.əl/
UK /ˈmʌs.əl/

1.
мышца
a band or bundle of fibrous tissue in a human or animal body that has the ability to contract, producing movement in or maintaining the position of parts of the body.
:
•
He pulled a muscle in his leg while running.
Он потянул мышцу на ноге во время бега.
•
Regular exercise helps build strong muscles.
Регулярные упражнения помогают наращивать сильные мышцы.