1. a tough fibrous tissue connecting muscle to bone; a tendon
2. muscular strength or power
3. the source of strength or power in something

1. to strengthen with or as if with sinews
Usage: literary

Examples

• The athlete injured a sinew in her leg during the race.
• He flexed his muscles, showing the sinews beneath his skin.
• The old man still had the sinew to chop wood.
• Small businesses are the sinew of the local economy.
• Hard work and determination are the sinews of success.
• The rope was sinewed with steel wire for extra strength.
• Years of labor had sinewed his arms with visible tendons.