It is probable that this nonSemitic form A-usar means "well watered region," a most appropriate designation for the river settlements of Assyria.
The method of word formation in Sumerian is entirely nonSemitic in character.
The latter acquired the Semitic language imperfectly from their conquerors; they expressed the verbal conjugations by periphrases, mispronounced the consonants, and so changed greatly, the appearance of the vocabulary, which also would certainly contain a large proportion of native nonSemitic roots.