Learn Icelandic: Er þetta einhvers konar varahlutur?

The phrase einhvers konar translates to "some kind of", but literally means "of some kind". einhvers is the genitive form of einhver (some), and konar is the genitive of an old noun meaning "kind" or "sort". Together, they form a fixed phrase that acts like an adjective describing varahlutur.

Does einhvers konar change the case of the noun that follows it?

No, it doesn't. Even though einhvers konar is made of genitive words, it doesn't force the following noun into the genitive. The phrase stays frozen as einhvers konar, while the noun varahlutur takes whatever case the rest of the sentence requires. Here it is in the nominative because it simply follows the verb er (to be).

Is it also correct to write einhverskonar as a single word?

Yes, you will see both einhvers konar (two words) and einhverskonar (one word) in Icelandic. The official spelling rule recommends keeping them separate since they are technically two distinct words, but they are pronounced together and function as a single unit, so writing them as one word is very common and accepted in everyday use.

Why do we use the neuter pronoun þetta when varahlutur is a masculine noun?