This is the 305th most frequent Croatian word.
kažu
"Kažu" means "they say" in English.
Here, 'kažu' conveys speech directed towards the first person, with the additional clarification of being told something specific.
Kažu mi da trebam biti strpljiv.
They tell me I need to be patient.
The word 'kažu' is used to denote anonymous or generalized speech, as in 'they say'.
Kažu da dolazi oluja.
They say a storm is coming.
In this sentence, 'kažu' is applied in an interrogative context to inquire about collective opinions.