ispunjavati

1. (of a form) to fill in; to fill out
   Na šalteru sam pola sata ispunjavao obrasce. — I spent half an hour filling out forms at the counter.
2. (promise, wish, duty) to fulfill; to keep
   On uvek ispunjava svoja obećanja. — He always keeps his promises.
   Roditelji su joj ispunjavali svaku želju. — Her parents granted her every wish.
3. (of conditions, requirements) to meet; to satisfy
   Nažalost, ne ispunjavate uslove za kredit. — Unfortunately, you don't meet the requirements for the loan.
4. (of feelings, work) to fulfill; to fill
   Ovaj posao me zaista ispunjava. — This job really fulfills me.
5. (of space, time) to fill; to fill up
   Miris kafe ispunjava celu kuhinju. — The smell of coffee fills the whole kitchen.
6. (ispunjavati se) to come true
   Snovi se ponekad ispunjavaju. — Dreams sometimes come true.

For forms, popunjavati is also very common.