Cord (noun)

1. A long, thin, and flexible rope or string made of twisted fibers.
2. A unit of measurement for firewood, usually equal to a stack 4 feet high, 8 feet long and 4 feet wide.
3. A bundle of nerve or muscle fibers.

Origin:

From middle english corde, from old english cord, from proto-germanic *kurtaz ("cord, rope"), from proto-indo-european *(s)ker- ("to turn, ben.d")

Examples:

1. He tied the boat to the dock with a cord.
2. She bought a cord of wood for the winter.
3. The spinal cord connects the brain to the rest of the body.