sekirati

1. colloq. (sekirati se) to worry; to fret
   Ne sekiraj se, sve će biti u redu. — Don't worry, everything will be fine.
   Mama se stalno sekira zbog mene. — Mom is always worrying about me.
2. colloq. (+ acc.) to upset; to bother
   Nemoj da sekiraš baku tim pričama. — Don't upset Grandma with those stories.
   Sekira me što se ne javlja. — It bothers me that he doesn't get in touch.

The cause of worry is usually expressed with "zbog" + gen. or "oko" + gen.: sekirati se zbog posla.