Englishghostly
adjective
a ghostly figure appeared at the end of the tunnel:
ghostlike, spectral, phantom, wraithlike, phantasmal, phantasmic, unearthly, unnatural, supernatural, otherworldly, insubstantial, illusory, unreal, shadowy, eerie, weird, uncanny, mysterious, magical, mystic, strange, abnormal, freakish;
frightening, spine-chilling, hair-raising, blood-curdling, scaring, terrifying, petrifying, chilling, sinister;
Scottish eldritch;
informal creepy, scary, spooky, freaky;
British, informal rum.