Fun etymology of Hrathi/Fart = the scandinavian words for speed.
fart is related (in this context) to english fare, as in taxi fare, farewell, etc., meaning to go. Icelandic, hrathi, is related directly to english 'rather'. In old english, 'rather' meant 'i'd sooner/.faster', e.g. 'i'd sooner eat a pencil', meaning, 'i'd faster or more quickly decide to eat a pencil'. Hence, rather, in english, came to mean, a preferred alternative, rather than 'faster'. Another interesting instance of 'rather' is the name Hrothgar in the poem Beowulf. It means 'Fast Spear', compare english 'rather gore', where gore means to be speared by a bull. Hrothgar survives in modern English as ROGER. Which hilariously in british slang means to... spear someone... with something. As in "give someone a good rogering".