Meaning

adjective suggestive of the supernatural; mysterious

adjective inspiring a feeling of fear; strange and frightening

originFrom Middle English eri (“fearful”), from Old English earg (“cowardly, fearful”), from Proto-West Germanic *arg, from Proto-Germanic *argaz. Akin to Scots ergh, argh from the same Old English source. Doublet of argh.

Etymology from Wiktionary, CC BY-SA 3.0