As a culture area the Arab world has had different ecological structures nomadic (bedouin) and sedentary (rural and urban) with parallel linguistic systems. Throughout the long history of the Arabic language, the development of transitional stages has generated linguistic correlates in Arabic dialects. The notion "ecolinguistics," combined and reinforced with the concepts of "compatibility" and "lexical diffusion," is introduced in this study to identify such a sociolinguistic change. The domain of change for this ecolinguistic variation is the extended family in which the middle generation...