staple

Material suitable for manufacture or use or finishing.

A natural fiber (raw cotton, wool, hemp, flax) that can be twisted to form yarn.

“staple fibers vary widely in length”

(usually in the plural) a necessary commodity for which demand is constant.

A short U-shaped wire nail for securing cables.

Paper fastener consisting of a short length of U-shaped wire that can fasten papers together.

Necessary or important, especially regarding food or commodities.

“wheat is a staple crop”

Secure or fasten with a staple or staples.

“staple the papers together”