gibati

1. formal (gibati se) to sway; to rock
   Grane su se lagano gibale na vetru. — The branches were swaying gently in the wind.
   Čamac se gibao na talasima. — The boat was rocking on the waves.
2. formal (+ acc.) to rock; to sway
   Vetar je gibao visoku travu. — The wind was swaying the tall grass.

In Serbia njihati se and ljuljati se are more common; gibati sounds literary.