"Emile Benveniste also notes that "the Avestan word for 'country' dahyu (anc-dasyu) has as its Sanskrit correspondent dasyu" and that this "reflects conflict between the Indian and Iranian peoples". But he tries to fit it into the invasionist paradigm by suggesting that "the name by which this enemy people called themselves collectively took on a hostile connection" and was later applied to natives of India: therefore in the Rigveda "dasyu may be taken as an ethnic" of India!"
January 1, 1970
https://en.wikiquote.org/wiki/%C3%89mile_Benveniste