Gunny is a type of coarse, plain-woven fabric typically made from jute, a natural fiber.
Here's how the name evolved:
* Jute: The raw material, jute, is a strong and durable fiber.
* Gunny: The fabric woven from jute is called gunny. It was often used for sacks, due to its durability.
* Gunny sack: The name simply combines the material "gunny" with its common use as a "sack."
So, a gunny sack is called that because it's made from gunny cloth, which is known for its strength and suitability for making sacks.