Proper noun
Yggdrasil
(Norse mythology) An immense ash tree that is central in Norse cosmology, believed to connect the nine worlds.
A squirrel called Ratatoskr scurries up and down the ash Yggdrasil carrying "malicious messages" between the eagle and Níðhöggr. Source: Internet
At first, the party only travels on foot, but is eventually permitted to make use of a variety of vehicles, including their gears and the "sand submarine" Yggdrasil. Source: Internet
John Lindow points out that Yggdrasil is described as rotting on one side and as being chewed on by four harts and Níðhöggr, and that, according to the account in Gylfaginning, it also bears verbal hostility in the fauna it supports. Source: Internet
Gangleri asks what there is to tell about Yggdrasil. Source: Internet
In Gylfaginning, Yggdrasil is introduced in chapter 15. In chapter 15, Gangleri (described as king Gylfi in disguise) asks where is the chief or holiest place of the gods. Source: Internet
Finally the Finno-Ugaritic strand of this diffusion spread through Russia to Finland where the Norse myth of Yggdrasil took root. Source: Internet