opteretiti

1. to burden; to weigh down; to overload
   Nove obaveze su ga potpuno opteretile. — The new duties completely weighed him down.
   Ovaj kredit će opteretiti kućni budžet. — This loan will put a strain on the household budget.
2. (of a load, structure) to load; to put a load on
   Nemoj previše da opteretiš kamion. — Don't load the truck too heavily.
3. colloq. (opteretiti se + instr.) to get hung up on; to stress over
   Previše se opteretio tim glupim komentarom. — He got way too hung up on that stupid comment.

The burden goes in the instrumental: opteretiti koga čime.