Guttural R
Many Jewish immigrants to Israel spoke a variety of Arabic in their countries of origin and pronounced the Hebrew rhotic as an alveolar tap , similar to Arabic '. Gradually, many of them began pronouncing their Hebrew rhotic as a voiced uvular fricative , a sound similar or (depending on the Arabic dialect) identical to Arabic '. However, in modern Sephardic and Mizrahi poetry and folk music an alveolar rhotic continues to be used.
Hejazi Arabic
Also referred to as the sedentary Hejazi dialect, this is the form most commonly associated with the term "Hejazi Arabic", and is spoken in the urban centers of the region, such as Jeddah, Mecca, and Medina. With respect to the axis of bedouin versus sedentary dialects of the Arabic language, this dialect group exhibits features of both. Like other sedentary dialects, the urban Hejazi dialect is less conservative than the bedouin varieties in some aspects and has therefore shed some Classical forms and features that are still present in bedouin dialects, these include gender-number disagreement, and the feminine marker "-n" (see Varieties of Arabic). But in contrast to bedouin dialects, the constant use of full vowels and the absence of vowel reduction plus the distinction between the emphatic letters and is generally retained.The Arabic of today is derived principally from the old dialects of Central and North Arabia which were divided by the classical Arab grammarians into three groups: Hejaz, Najd, and the language of the tribes in adjoining areas. Though the modern Hejazi dialects has developed markedly since the development of Classical Arabic, and Modern Standard Arabic is quite distinct from the modern dialect of Hejaz. Standard Arabic now differs considerably from modern Hejazi Arabic in terms of its phonology, morphology, syntax, and lexicon, such diglossia in Arabic began to emerge at the latest in the sixth century CE when oral poets recited their poetry in a proto-Classical Arabic based on archaic dialects which differed greatly from their own.