varvarski

1. barbaric; savage
   To je bio varvarski napad na civile. — It was a barbaric attack on civilians.
2. (in history) barbarian
   Varvarska plemena su napala Rimsko carstvo. — Barbarian tribes attacked the Roman Empire.

3. barbarically; savagely
   Stari park su varvarski posekli zbog zgrade. — The old park was barbarically cut down for a building.

Serbian uses varvarski; barbarski is the Croatian form.