Wraith
Wraith , noun
[Scot. wraith, warth; probably originally, a guardian angel, from Icelandic vorer a warden, guardian, akin to English ward. See Ward a guard.]
1.
An apparition of a person in his exact likeness, seen before death, or a little after; hence, an apparition; a specter; a vision; an unreal image. [Scottish]
She was uncertain if it were the gypsy or her wraith.
O, hollow wraith of dying fame.
2.
Sometimes, improperly, a spirit thought to preside over the waters; -- called also water wraith. — M. G. Lewis