Uj-

From Fresh Dictionary

Esperanto

Affix

uj-

1. something filled with, a container or box for, e.g. inko ink, inkujo ink-pot.
2. a tree bearing a fruit, e.g. pomo apple, pomujo apple tree.
3. a country inhabited by, or associated with, an ethnic group, e.g. turko Turk, Turkujo Turkey.