obvezati

1. Croat. (+ acc., na + acc.) to oblige; to bind
   Ugovor ih je obvezao na plaćanje štete. — The contract bound them to pay for the damage.
2. Croat. (obvezati se) to commit oneself; to undertake
   Grad se obvezao obnoviti stari most. — The city committed to restoring the old bridge.
   Obvezao sam se da ću mu pomoći. — I promised to help him.

In Serbia the word is obavezati (se).