ELF n.
An imaginary supernatural being, commonly a little sprite, much like a fairy; a mythological diminutive spirit, supposed to haunt hills and wild places, and generally represented as delighting in mischievous tricks. Every elf, and fairy sprite, Hop as light as bird from brier. Shak.
ETHEREAL a.
Consisting of ether; hence, exceedingly light or airy; tenuous; spiritlike; characterized by extreme delicacy, as form, manner, thought, etc. Vast chain of being, which from God began, Natures ethereal, human, angel, man. Pope.