This is the 937th most frequent Azerbaijani word.
bilməlidir
"Must know."
Here, 'bilməlidir' implies an obligation or necessity to know.
O, bu məsələni tez bir zamanda bilməlidir.
He/she must know this matter immediately.
In this sentence, 'bilməlidir' again denotes a necessity or responsibility in the context of awareness.
Hər kəs öz hüquqlarını bilməlidir.
Everyone must know their rights.
Here, 'bilməliyik' (the plural form) shows a requirement or need to have prior knowledge.