How do you spell koushari in Arabic?

There isn't one single definitive spelling for Koushari in Arabic because the transliteration from the Egyptian dialect can vary slightly. However, the most common and widely accepted spellings are:

* كسْكُسَارِي (kuskusāri) - This is probably the closest representation phonetically.

You'll also sometimes see variations, but they're generally minor and based on different transliteration systems. The important thing is the pronunciation, which is fairly consistent.