PappaSmurf
Knight
"n"
Nightmare
And all this time you thought they were pretty black horseys
Nightmare
The mare in nightmare is not a female horse, but a mara, an Anglo-Saxon and Old Norse term for a spirit that sat on sleepers' chests, causing them to have bad dreams.
Such a mare-induced bad dream is called a nightmare in English, a mareridt in Danish, a couchmar in French, and an Alpdruck or Alptraum in German. The alp is a demonic being which presses upon sleeping people so that they cannot utter a sound. These attacks are called Alpdrücke (nightmares).
And all this time you thought they were pretty black horseys