klečati

1. to kneel; to be kneeling
   Baka kleči ispred ikone i moli se. — Grandma is kneeling in front of the icon, praying.
   Klečao je u bašti i čupao korov. — He was kneeling in the garden, pulling weeds.
2. (before someone) to grovel; to bow down
   Neću da klečim pred šefom zbog povišice. — I won't grovel before the boss for a raise.

Describes the position; to go down on one's knees is kleknuti.