nastoitettuja

Nastoitettuja is a Finnish adjective form meaning “having studs” or “studded.” It is the plural object form of the participle nastoitettu, derived from the stem nasto- (nasta means stud or spike) and the noun nastoitus, which denotes the process of adding studs. The word is used to describe items that have been fitted with studs, typically metal studs used to improve traction on ice or snow.

In practice, nastoitettuja is most often encountered in automotive contexts, especially with tires. The common phrase nastoitettuja renkaita refers to studded tires. The form can also describe other equipment or gear where studs have been installed, though tires are by far the most frequent example. Grammatically, nastoitettuja is used with plural nouns in the partitive or accusative case, as in Ostan nastoitettuja renkaita (I am buying studded tires) or Käytämme nastoitettuja renkaita talvella (We use studded tires in winter).

Related terms include nastoitus (the act of studding) and nastan (the stud itself). The word is a standard part of Finnish vocabulary for discussing traction-enhancing devices and related equipment. While primarily tied to tires, its general meaning extends to any item that has been fitted with studs or spikes.