barghest

from The Collaborative International Dictionary of English v.0.48

Barghest \Bar"ghest`\, n. [Perh. G. berg mountain + geist demon,
   or b[aum]r a bear + geist.]
   A goblin, in the shape of a large dog, portending misfortune.
   [Also written {barguest}.]
   [1913 Webster]