noun
thew
THYOO/θˈu/
A body's muscle or sinew.
The young man's thews tense as he lifts the heavy stone.

Etymology
From habits and customs, the plural came to describe personal qualities. The notion of good qualities extended to bodily powers and good physique, eventually giving thew its sense of muscular strength.
More examples
- The climber strains every thew to reach the ledge.
- His rolled-up sleeves reveal the thews of a seasoned rower.
- The work demands strong thews as well as patience.
Forms
thew · thews