pridržati

1. to hold for a moment; to hold steady
   Možeš li da mi pridržiš vrata? — Can you hold the door for me?
   Pridržao sam joj torbu dok je tražila ključeve. — I held her bag while she looked for her keys.
2. (pridržati se za + acc.) to hold on to
   Pridrži se za ogradu, stepenice su klizave. — Hold on to the railing, the stairs are slippery.
3. (pridržati se + gen.) to adhere to; to follow; to stick to
   Moramo se pridržati uputstva lekara. — We have to follow the doctor's instructions.
   Nije se pridržao dogovora. — He didn't stick to the agreement.

In the sense "to adhere to" it takes se and the genitive: pridržati se pravila.