Dragonrend

 is a Dragon Shout in The Elder Scrolls V: Skyrim. JOOR, ZAH and FRUL are the necessary words of power needed to use this shout. All three words of the Shout are obtained during Alduin's Bane.

Function
Dragonrend works by forcing the targeted dragon to understand the meaning of mortality -- something so utterly incomprehensible to an immortal dragon that the knowledge tears at their very soul, breaking their concentration enough so they cannot focus on flying. When used on a dragon, the dragon finds a place to land, upon which it remains temporarily paralyzed.

Dragonrend can also be used to interrupt the shouts of a dragon such as powerful breath shouts. A dragon can be kept permanently on the ground if the shout is used repeatedly.

Story
During the great Dragon War in ages past, the Dragonrend shout was crafted by the first mortal Tongues - those who had learned the use of Thu'um from Paarthurnax - to be used as a powerful weapon against dragons. Atop the Throat of the World, these Tongues used the shout to strike out at Alduin, forcing the World-Eater to land and confront Gormlaith Golden-Hilt, Hakon One-Eye, and Felldir the Old. The ensuing battle allowed the heroes to use an Elder Scroll to cast Alduin adrift on the tides of time in the hopes that he would be forever defeated. Sending Alduin through time resulted in a time wound being created.

Bugs

 * May only function on dragons that have detected the Dragonborn.