Synonyms:
eldritch, weird, uncanny, unearthly
Meaning: suggesting the operation of supernatural influences; "an eldritch screech"; "the three weird sisters"; "stumps...had uncanny shapes as of monstrous creatures"- John Galsworthy; "an unearthly light"; "he could hear the unearthly scream of some curlew piercing the din"- Henry Kingsley
Usage examples
And the woman, whose voice had risen to a kind of eldritch sing-song, turned with a skip, and was gone.