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.
Arab (etymology)
The early Nabateans are also referred to as "ʿarvim" in Nehemiah 4:7 and the singular "ʿarvi" is applied to Geshem a leader who opposed Nehemiah. This term is identical to "ʿaravi" in unvowelled text but traditionally vowelized differently. It is usually translated "Arabian" or "Arab" and was used in early 20th century Hebrew to mean Arab. However it is unclear if the term related more to "ʿarav" or to "ʿerev". On the one hand its vowelization resembles that of the term "ʿarvati" (Arbathite) which is understood as an adjective formed from "ʿaravah "; thus it is plausibly a similarly formed adjective from "ʿarav" and thus a variant of "ʿaravi ". On the other hand, it is used in 2 Chronicles 21:16 for a seemingly different people located in Africa plausibly the same Africans referred to as an "ʿerev" (mix of people) in Ezekiel 30:5. Any of the other meanings of the root are also possible as the origin of the name.