Okay she had read this in her book somewhere. Think, think, think, "Galdr or Galdor, from the Old Norse, originally meant 'incantation'. The verb "gala" can be used it means "to crow" and later came to mean magic in general. These sounds are used in runic oral spells. For example for Fehu rune it could sound like this..." pausing to clear her throat then

"fehu fehu fehu
f f f f f f f f f
fu fa fi fe fo
of ef if af uf
f f f f f f f f f"

She finished the incantation. "It almost reminds people of the muggle story Jack and the beanstalk where the giant recites, Fe fi fo fum."