attempt has been made to explain how a word signifying "god" came to mean "devil," as the result of national conflicts, the Asuras or gods of extra-Vedic tribes becoming demons to the Vedic Indian, just as the devas or gods of the Veda are demons in the Avesta. There is no traditional evidence in support of this view, and it is opposed by the fact that to the Rigvedic Indian asura not only in general meant a divine being, but was especially appropriate to Varuṇa, the most exalted of the gods. The word must therefore have changed its meaning in course of time within the Veda itself. Here it seems from the beginning to have had the sense of "possessor of occult power," and hence to have been potentially applicable to hostile beings. Thus in one hymn of the Rigveda (x. 124) both senses seem to occur. Towards the end of the Rigvedic period the application of the word to the gods began to fall into abeyance. This tendency was in all likelihood accelerated by the need of a word denoting the hostile demoniac powers generally, as well as by an incipient popular etymology, which saw a negative (a-sura) in the word and led to the invention of sura, "god," a term first found in the Upanishads.
A group of aërial demons, primarily foes of Indra, are the Paṇis. The proper meaning of the word is "niggard," especially in regard to sacrificial gifts. From this signification it developed the mythological sense of demons resembling those originally conceived as withholding the treasures of heaven. The term dāsa or dasyu, properly the designation of the dark aborigines of India contrasted with their fair Aryan conquerors, is frequently used in the sense of demons or fiends.
By far the most conspicuous of the individual aërial
