zagrejati

1. (+ acc.) to warm up; to heat up
   Zagrejala sam ručak u mikrotalasnoj. — I heated up lunch in the microwave.
   Upali peć da zagrejemo sobu. — Turn on the heater so we can warm up the room.
2. (zagrejati se) to warm up; to get warm
   Popij čaj da se zagreješ. — Drink some tea to warm yourself up.
   Voda se brzo zagrejala. — The water heated up quickly.
3. (zagrejati se, in sports) to warm up
   Igrači su se zagrejali pre utakmice. — The players warmed up before the match.
4. (of an audience, mood) to warm up; to get going
   Predgrupa je odlično zagrejala publiku. — The opening act warmed up the crowd brilliantly.

'To get warm' or 'to warm up' before exercise is zagrejati se; 'to get keen on something' is zagrejati se za nešto.