Pronunciation: (sin'yOO), [key]
1. a tendon.
2. Often, sinews. the source of strength, power, or vigor: the sinews of the nation.
3. strength; power; resilience: a man of great moral sinew.
to furnish with sinews; strengthen, as by sinews.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.