Staple
/ˈsteɪ.pəl/
noun
A town containing merchants who have exclusive right, under royal authority, to purchase or produce certain goods for export; also, the body of such merchants seen as a group.
(by extension) Place of supply; source.
The principal commodity produced in a town or region.
verb
To sort according to its staple.
“to staple cotton”
adjective
Relating to, or being market of staple for, commodities.
“a staple town”
Established in commerce; occupying the markets; settled.
“a staple trade”
Fit to be sold; marketable.