A piece of tough fibrous tissue uniting muscle to bone or bone to bone; a tendon or ligament. The sinew in his leg was strained after the intense workout.
The parts of a structure, system, or organization that give it strength or bind it together. The community's volunteers are the sinew of the local charity.
Physical strength or muscular power, especially as an attribute of a person or animal. He relied on sinew rather than strategy to win the contest.