The established example is عُمَرُ, treated as transformed from عَامِرٌ. زُفَرُ is likewise treated as an assumed transformation from a form on فَاعِلٌ; in grammatical analysis this is زَافِرٌ.
Here the two causes are proper-name status (علم) and transformation (عدل).
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Cause of Ghayr Munsarif: Transformation (Adl)
The established example is عُمَرُ, treated as transformed from عَامِرٌ. زُفَرُ is likewise treated as an assumed transformation from a form on فَاعِلٌ; in grammatical analysis this is زَافِرٌ.
Here the two causes are proper-name status (علم) and transformation (عدل).