Proper noun
Gleipnir
(Norse mythology) The binding that holds Fenrir, a chain made of six impossible objects forged together by the dwarves.
High says that one example of Týr's bravery is that when the Æsir were luring Fenrir (referred to here as Fenrisúlfr) to place the fetter Gleipnir on the wolf, Týr placed his hand within the wolf's mouth as a pledge. Source: Internet
The creation of Gleipnir is said to be the reason why none of the above exist. Source: Internet
The dwarves constructed Gleipnir from six mythical ingredients. Source: Internet
When Fenrir kicked, Gleipnir caught tightly, and the more Fenrir struggled, the stronger the band grew. Source: Internet