This is the 558th most frequent Persian word.
روستای
"روستای" means "village" in English.
Here, 'روستای' is used to describe the type of place the subject lives in, specifying that it is a village.
آنها در یک روستای کوچک زندگی میکنند.
They live in a small village.
In this sentence, 'روستای' denotes the destination of motion, referring to a specific village.
ما به روستای بالا دست خواهیم رفت.
We will go to the upper village.
Here, 'روستای' is identifying a particular village by its name or characteristic.