nemoguć

1. impossible
   To je nemoguć zadatak. — That's an impossible task.
   Nemoguće je naći parking u centru. — It's impossible to find parking downtown.
2. colloq. (of a person) impossible; unbearable
   Danas si stvarno nemoguć! — You're really impossible today!
3. colloq. ridiculous; outlandish
   Nosila je neku nemoguću haljinu. — She was wearing some ridiculous dress.

The neuter form nemoguće is common in impersonal phrases: nemoguće je + infinitive or da clause.