This is the 353rd most frequent Persian word.
میگویند
"They say" or "it is said."
The word 'میگویند' is used to indicate an unspecified general sentiment or belief—'they say'.
میگویند که کتاب خواندن ذهن را باز میکند.
They say that reading books broadens the mind.
Here, 'میگویند' suggests a collective opinion expressed by a specified group ('people interested in astronomy').
افرادی که به نجوم علاقه دارند، میگویند که شبها پر از رمز و راز است.
People who are interested in astronomy say that nights are full of mysteries.
The word 'میگویند' conveys hearsay or a widely known claim in this case.