This is the 943rd most frequent Persian word.
عراقی
"Iraqi" (relating to Iraq or its people).
Here, 'عراقی' is an adjective describing the noun 'مردم', indicating the nationality of the people—the Iraqis.
مردم عراقی به مهماننوازی معروف هستند.
Iraqi people are known for their hospitality.
In this sentence, 'عراقی' is an adjective modifying the noun 'غذا', specifying the origin or style of the food.
من غذای عراقی را بسیار دوست دارم.
I really like Iraqi food.
'عراقی' serves as an adjective for 'فرهنگ و تاریخ', relating to the culture and history of Iraq.