Old English gastlic "spiritual, holy, not of the flesh; clerical;" also "supernatural, spectral, pertaining to or characteristic of a ghost;" see ghost (n.) + -ly (1). Related: Ghostliness.
a ghostly face at the window
*gheu-
Ghibelline
*ghieh-
ghost
*ghos-ti-
ghostly
ghoul
ghoulish
*ghredh-
*ghrei-
*ghwer-