delati

1. formal to act; to take action
   Treba manje pričati, a više delati. — We should talk less and act more.
   Uvek je delao u skladu sa svojim uverenjima. — He always acted according to his beliefs.
2. formal to do; to work; to create
   Ceo život je delao dobro za druge. — All his life he did good for others.

In everyday speech raditi or postupati is used instead.