zračiti

1. (+ instr.) to radiate; to exude
   Ona prosto zrači srećom. — She's simply radiating happiness.
   Ovaj čovek zrači samopouzdanjem. — This man exudes confidence.
2. (of a source of energy) to emit; to radiate
   Sunce zrači toplotu i svetlost. — The sun radiates heat and light.
   Da li mobilni telefoni stvarno zrače? — Do mobile phones really emit radiation?
3. (in medicine) to treat with radiation
   Posle operacije su ga zračili mesec dana. — After the surgery they gave him radiation therapy for a month.
   Moja tetka se sada zrači na onkologiji. — My aunt is having radiotherapy at the oncology clinic now.

In the sense 'to exude a feeling' it usually takes the instrumental: zračiti srećom, energijom.