Fëa

fëa (pl. fëar) is the Quenya word for "soul, indwelling spirit of an incarnate being". The union of fëa and hröa ("body") was the essential characteristic of the Incarnates.

The fëar were sent into Eä directly by Ilúvatar; and unlike the hröa, they are indestructible and unable to be dominated by any force within Eä, unless they give consent. The Sindarin equivalent is fae.

The word fëar is only used in reference to souls whose natural state is to be incarnated; those spirits that do not require a hröa in order to be complete are called ëalar ("beings").

Fëar were sent to inhabit the Ents. Unbodied fëar, could be controlled by necromancy (See also: undead).

Animals, and according to some lore beings like the Orcs, were soulless (did not possess fea).