Jute is a very long fiber that comes from a plant and is used to make rugs, ropes, and other things. Jute twine feels coarse and rough, and is very strong.
Jute is useful because of its length and cheapness — it provides an easy way to make an inexpensive sack or floor mat. If you've ever planted a small tree, you've probably uncovered its roots from their jute wrapping first, and if you've bought a five-pound bag of rice or sugar, it most likely came in a rough jute bag. Jute comes from the Bengali word jhuto, from the Sanskrit root juta-s, "twisted hair."