graničiti

1. (graničiti se + s/sa + instr.) to border
   Srbija se graniči sa osam država. — Serbia borders eight countries.
   Naše imanje se graniči sa šumom. — Our property borders the forest.
2. (+ s/sa + instr.) to verge on; to border on
   Njegova hrabrost graniči sa ludilom. — His courage borders on madness.
   To se već graniči sa bezobrazlukom. — That's already verging on rudeness.

In Serbia, for borders the usual form is graničiti se sa; in the figurative sense both forms, with and without se, occur.