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.
Levantine Arabic
Ancient Arabia was home to a continuum of Central Semitic languages in antiquity which stretched from the southern Levant to Yemen. The isoglosses associated with Arabic are clustered at the northern end of this continuum, in the northern Hijaz and the southern Levant. This may be in part due to a lack of documentation, but it is clear that Central Arabia was home to languages quite distinct from Arabic. Thus, Arabic can be said to have emerged in the second millennium BC and spread into the peninsula, replacing its sister languages on the Central Semitic continuum.