Kupariset
Kupariset is the Finnish plural form of the adjective kuparinen, meaning coppery or made of copper. The term is used to describe objects, materials, or colors that have the appearance or composition of copper. In everyday Finnish, kupariset can modify plural nouns such as korut (jewelry), levyt (plates or sheets), or esineet (items).
Etymology and grammar: The base word kupari means copper. The adjective is formed with the suffix -inen,
Usage and contexts: Kupariset is common in catalogues, descriptions, and discussions of objects with copper surfaces
Related forms: The singular form is kuparinen, used for singular nouns like kuparinen koru (a copper jewelry