What is "arakvaz"

Arakvaz (, also Romanized as Arak Vāz, Arkvāz, Erkewaz, and Arkwāz; also known as Arkavāzī, Arak Vāz-e Malek Shāhī, and Qal‘eh Darreh) is a city in and capital of Malekshahi County, Ilam Province, Iran. At the 2006 census, its population was 14,225, in 2,771 families. It is adjacent to the city of Delgosha, bordering it to the north.