Twine is the strong braided string that's often tied around a bakery box or used to secure a Christmas tree to the top of your car.
Twine can be made of cotton, hemp, or even plastic — it's stronger than string, but thinner than rope. It can be used to stake plants in the garden or to tie up a package of cheese from a deli. Twine can also be a verb meaning "to twist around," the way threads are twisted into a strand of twine. Your cats might twine around each other to sleep, for example. The Old English version was twin, or "double strands of thread."