causing a feeling of mystery and fear

spooky

pale and ill; causing horror or fear

horrifying, dreadful; pale

that cannot be seen

unable to be seen; hidden

horrible, causing fear (because suggesting death)

eerie; deathlike

of the soul, not of material things; of, from, God; a religious song as first sung by Black people in the US

religious, otherworldly

of something that is not controlled or explained by physical laws

mysterious, not of this world

not natural, mysterious

very strange, unusual

mysterious; ghostly; unreasonable

supernatural; very strange

unnatural; strange; very unusual

odd, bizarre