Questions & Answers about Ég hitti vinkonu mína í borginni.
Vinkona is the basic (dictionary) form in the nominative case — that’s what you use for the subject of a sentence.
In Ég hitti vinkonu mína í borginni, vinkonu mína is the direct object (“(my) friend” is the one being met), so Icelandic puts it in the accusative case.
Feminine nouns ending in -a (like vinkona) usually have -u in the singular accusative:
- nominative: vinkona – “(a) (female) friend” (as subject)
- accusative: vinkonu – “(a) (female) friend” (as object)
So you need vinkonu here because it is the object of hitti (“met / meet”).
Icelandic distinguishes the gender of “friend”:
- vinur – a (male) friend, grammatically masculine
- vinkona – a (female) friend, grammatically feminine
So:
- Ég hitti vinkonu mína… = I met my female friend …
- Ég hitti vin minn… = I met my male friend …
If you don’t care about the friend’s gender in English, you still have to choose one in Icelandic.