The Arabic word "مادين" (مدن) is a plural noun that means "cities." It is in the accusative case because it is the object of the verb "اعراب" (اعراب), which means "to analyze" or "to parse."
Here is the full breakdown of the sentence:
- اعراب (اعراب): فعل مضارع مرفوع بالضمة الظاهرة على آخره (verb in the present tense, raised by the damma visible at the end)
- مادين (مدن): مفعول به منصوب بالياء لأنه جمع مذكر سالم (object of the verb, منصوب by the ya' because it is a plural masculine sound noun)
Therefore, the full sentence literally translates to "to analyze the cities."