eerie

Concise Oxford English Dictionary © 2008 Oxford University Press:
eerie /ˈɪəri/

▶adjective (eerier, eeriest) strange and frightening.

– derivatives
eerily adverb,
eeriness noun.

– origin ME (orig. northern English and Scots in the sense ‘fearful’): prob. from OE earg ‘cowardly’, of Gmc origin.