štoviše

1. Croat. moreover; what's more; in fact
   Nije loše, štoviše, odlično je. — It's not bad; in fact, it's excellent.
   Posao je težak, a štoviše i loše plaćen. — The job is hard and, what's more, badly paid.
2. Croat. even
   Svi su se složili, štoviše i on. — Everyone agreed, even him.

In Serbia the word is štaviše.