This is the 17324th most frequent Polish word.
zamykane
"Zamykane" means "lockable" or "closable" in English.
Here, 'zamykane' is used as an adjective in a passive construction indicating an action that is regularly performed on the object's state (i.e., closing the doors).
Drzwi do magazynu są zamykane na noc.
The doors to the warehouse are locked at night.
In this sentence, 'zamykany' (masculine singular form) describes a routine action performed regularly on the object.
Zamek w sejfie jest zamykany co wieczór.
The lock in the safe is locked every evening.
Here, 'zamykana' indicates a repeated or ongoing past action applied to the book in a passive form.