صَرَّفَ — يُصَرِّفُ — تَصْرِيف has middle-radical gemination but no initial tāʾ in the perfect.
تَقَبَّلَ — يَتَقَبَّلُ — تَقَبُّل has both initial formative tāʾ and a doubled middle radical.
تَعَجَّلَ — he hurried; tafaʿʿul.
عَجَّلَ — he hastened something or made it quick; tafʿīl.
Different augmented patterns from the same root can shift which participant is involved or how the action is expressed. Augmentation does not always signal one uniform kind of “intensity.”
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How tafʿīl differs from tafaʿʿul
Five Augmented Triliteral Patterns Without Hamzat al-Wasl
صَرَّفَ — يُصَرِّفُ — تَصْرِيف has middle-radical gemination but no initial tāʾ in the perfect.
تَقَبَّلَ — يَتَقَبَّلُ — تَقَبُّل has both initial formative tāʾ and a doubled middle radical.
تَعَجَّلَ — he hurried; tafaʿʿul.
عَجَّلَ — he hastened something or made it quick; tafʿīl.
Different augmented patterns from the same root can shift which participant is involved or how the action is expressed. Augmentation does not always signal one uniform kind of “intensity.”