Today's Halloweenish word is...
Fell (an adjective) is a semi-archaic word that means fierce, cruel, terrible, sinister and malevolent. It can also mean sharp or pungent (I'm assuming on terms of odors.) I first heard this word when I saw The Fellowship of the Ring, only I didn't know it at the time. The Fellowship attempts to climb the mountains over Moria, and Saruman is thwarting their progress by means of sorcery and chants. Legolas percieves that something is amiss and says "There is a fell voice on the air." Only at the time, I thought he said "There is a foul voice on the air," which seems just as appropriate. I don't think I realized the different until I actually read the book.
A fell is also a noun meaning a high barren field or moor, such as this one. This picture was taken in North Yorkshire on Skipton Moor.