Compare the corresponding slots in the two voices.
PassiveActiveSlot
صُرِّفَصَرَّفَPast
يُصَرَّفُيُصَرِّفُMudhaari'
مُصَرَّفٌمُصَرِّفٌParticiple
The Shaddah stays on the middle root letter; the internal vowel helps distinguish active from passive forms.
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Derived Trilateral (without Hamzah) - Bab 2: Taf'eel (Tasreef)
Compare the corresponding slots in the two voices.
PassiveActiveSlot
صُرِّفَصَرَّفَPast
يُصَرَّفُيُصَرِّفُMudhaari'
مُصَرَّفٌمُصَرِّفٌParticiple
The Shaddah stays on the middle root letter; the internal vowel helps distinguish active from passive forms.