pričuvati

1. (for a while, + acc.) to watch; to look after; to keep an eye on
   Možeš li mi pričuvati torbu dok se vratim? — Can you watch my bag until I get back?
   Komšinica mi je pričuvala dete sat vremena. — My neighbour looked after my child for an hour.
2. (for someone) to save; to keep
   Pričuvaj mi mesto, stižem za pet minuta. — Save me a seat, I'll be there in five minutes.
3. (pričuvati se, + gen.) to be careful; to beware of
   Pričuvaj se njega, nije pošten. — Beware of him, he's not honest.

Meaning "to beware", it takes se and the genitive: pričuvaj se psa.