say it: STAY-puhl
staple is a noun, verb and adjective meaning "(usually in the plural) a necessary commodity for which demand is constant". It carries 7 recorded senses.
a natural fiber (raw cotton, wool, hemp, flax) that can be twisted to form yarn
“staple fibers vary widely in length”
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
necessary or important, especially regarding food or commodities
“wheat is a staple crop”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for staple come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.