Learn Icelandic: Koparinn er nýsteyptur. - The copper is newly cast.

The prefix ný- means 'newly' or 'just'. When attached to steyptur (the past participle of steypa, meaning 'to cast' or 'to pour'), it creates the adjective nýsteyptur. This forms a 'recent state' participle, showing that the action was completed very recently.

Why does nýsteyptur have the -ur ending?

Because words formed with ný- + past participle behave like regular adjectives. They must agree with the noun they describe. Since Koparinn (the copper) is a masculine, singular noun in the nominative case, nýsteyptur takes the masculine nominative singular ending -ur.

What other contexts would use the word steyptur or the verb steypa?

Steypa is a very common verb in Icelandic. Aside from casting metals, it is the standard word for pouring concrete. In fact, concrete itself is also called steypa. You will frequently see nýsteyptur used on construction sites to warn people about 'freshly poured' concrete.

If I meant copper in general, would the ending of nýsteyptur change?