staple - noun

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

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

material suitable for manufacture or use or finishing

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

staple - verb

• secure or fasten with a staple or staples

staple - adjective

• necessary or important, especially regarding food or commodities

staple - thesaurus

basic