isprobati

1. to try out; to test
   Isprobali smo novi restoran u centru. — We tried the new restaurant downtown.
   Moraš da isprobaš ovaj recept, odličan je! — You have to try this recipe, it's great!
2. (of clothes, shoes) to try on
   Mogu li da isprobam ove farmerke? — Can I try on these jeans?

For 'to attempt to do something', probati or pokušati is usually used rather than isprobati.