Kopioidun

Kopioidun is a Finnish inflected form derived from the past participle kopioitu, itself formed from the verb kopioida ("to copy"). Grammatically, kopioidun is the genitive singular of the participle and appears in constructions that indicate possession, qualification or attribution in relation to a noun. As a participial form it functions similarly to an adjective and follows regular Finnish case morphology.

Common uses include attributive phrases and noun phrases where the copied item is being described or owned, for example: Kopioidun tiedoston nimi on sama kuin alkuperäisen (The name of the copied file is the same as the original's) or Kopioidun materiaalin käyttö vaatii luvan (Use of the copied material requires permission). The base participle kopioitu can also be inflected into other cases (e.g., kopioitua, kopioidulla) depending on syntactic role.

Etymologically, the verb kopioida is a borrowing connected to the European word for "copy" (through Swedish kopiera and related sources). In usage, kopioidun is a straightforward morphological marker in Finnish for creating descriptive or genitive relationships referring to something that has been copied.