This is the 769th most frequent Croatian word.
potrebne
"Potrebne" means "necessary" or "needed" in English.
In this instance, 'potrebne' describes 'materijale', emphasizing their essentiality for the project's completion.
Osigurali smo sve potrebne materijale za projekt.
We have provided all the necessary materials for the project.
Here 'potrebne' is an adjective modifying 'dokumente', indicating the specific quality of necessity or requirement.
Trebat ćemo potrebne dokumente za prijavu.
We will need the required documents for registration.
Here 'potrebne' is used to inquire about a singular neuter noun inferred contextually, reflecting the word's variability in usage.