Answer:
Nomadic.
Step-by-step explanation:
The Xiongnu were a tribal confederation of nomadic people who lived on the Eurasian Steppe. They were a dominant force on the area then known as Mongolia.
The Scythians were also Eurasian nomads who lived at the same time that the Xiongnu but they were more related with what today is known as Iran. They were located on the northern black sea and Fore-Caucasus.
I hope this answer helps you.