A Verbal that keeps you from moving. It does not however cause you to be helpless, and you are not frozen in one position. You're simply snared by one leg. From the Accelerant core rules:

"You cannot move your right foot from its spot. You may pivot on that foot, and you may move your left foot. A Root effect will last until you rest for five minutes."

This attack should not be confused with Paralyze or Agony.