Learn Arabic (Modern Standard): صديقي سعودي.

In Arabic, present tense sentences like this one do not use a word for "is" or "are". You simply put the subject (صديقي, my friend) right next to the description (سعودي, Saudi). This is known as a nominal sentence.

How do you say "my" in the word صديقي?

The word for "my" is actually attached to the end of the noun! The base word for "friend" is صديق (sadeeq). When you add the possessive suffix ـي (-ee) to the end, it becomes صديقي (my friend).

Why does the word سعودي end with the same "ee" sound as صديقي?

Although they look and sound similar, they are doing different jobs! The ـي on صديقي means "my". But the ـي on سعودي is a special ending used to turn a place or tribe name into an adjective (like adding "-ish" or "-i" in English). It changes "Saud" into "Saudi".

How would I say this if my friend is female?

You would need to make both words feminine. The word for a female friend is صديقة, so "my female friend" becomes صديقتي (sadeeqatee). Then, you make "Saudi" feminine by adding a taa marbuta (ـة), making it سعودية (su'uudiyya). The new sentence is: صديقتي سعودية.