Eldritch

Eldritch is an Old English derived word used to describe that which is otherworldly, often by being weird, ghostly, or uncanny. The Dictionary of the Older Scottish Tongue also associates the word with elven things, but that connection has been shown to be a misuse or appropriation. The word was often used in Scottish poetry and literature from the 1600s. In the 1900s, the word became more widely used in English after gaining popularity in books by H. P. Lovecraft and C. S. Lewis.