povisiti

1. (of a price, level) to raise; to increase
   Gazda nam je povisio kiriju za pedeset evra. — The landlord raised our rent by fifty euros.
   Firma je svima povisila platu. — The company gave everyone a raise.
2. (of voice, tone) to raise
   Nemoj da povisiš glas na dete. — Don't raise your voice at the child.
3. (of a structure) to make higher; to heighten
   Komšija je povisio ogradu za pola metra. — The neighbour made his fence half a metre higher.

The imperfective is povišavati; povišena temperatura means "a raised temperature, fever".