prskati

1. (of plants, insects) to spray
   Deda svakog proleća prska voćke. — Grandpa sprays the fruit trees every spring.
   Grad večeras prska protiv komaraca. — The city is spraying for mosquitoes tonight.
2. to splash; to sprinkle
   Deca se na plaži prskaju vodom. — The kids are splashing each other with water at the beach.
   Nemoj da me prskaš, hladno je! — Don't splash me, it's cold!
3. (of liquid, sparks) to spatter; to spit
   Pazi, ulje prska iz tiganja. — Careful, the oil is spitting out of the pan.
4. (of pipes, balloons, glass) to burst; to crack
   Cevi prskaju na mrazu. — Pipes burst in the frost.
   Baloni su prskali jedan za drugim. — The balloons were bursting one after another.

The perfective is poprskati; 'to splash each other' is prskati se. For the sense 'to burst, to crack' the perfective is prsnuti.