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.
Biblical Hebrew
Hebrew has almost lost the broken plural (if it ever had it), and any vestigial forms that may remain have been extended with the strong plural endings. The dual and strong plural endings were likely much like the Arabic forms given above at one point, with only the objective-case forms ultimately surviving. For example, dual "-ayim" is probably from "*-aymi" with an extended mimation ending (cf. Arabic "-ayni" above), while dual construct "-ē" is from "*-ay" without mimation. Similarly, "-īm" < "*-īma", "-ōt" < "*-āti". (Note that expected plural construct state "*-ī" was replaced by dual "-ē".)