what does "مرواح " and "روحان" mean in arabic?
and what does مجي??

what is this m prefix??

Question

what does "مرواح " and "روحان" mean in arabic?
and what does مجي??

what is this m prefix??

Answer

I think these are slang words you may heard them in a movie ,song or a series. 
مجي ؟  I don't know.
روحان ؟  I don't know 
But مرواح I think it means "gone" like when you say  he's gone.

Answer

Is it colloquial?
مجيئ بإضافة همزة تكون بمعنى قدوم
مرواح على وزن مفعال مثل مقدام منظار معطاء 
وهكذا :)
maybe cotext is important here, can you share please?

Answer

"مجيء هو مصدر فعل "جاء 
= it is the noun of the verb "to come"
"روحان هي مصدر فعل "راح
= the noun of the verb "to go". But it is not very used. We use more the verb ذهب and its noun is ذهاب

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