The original radicals and the augmentations must be identified separately:
أَكْرَمَ has root k-r-m, with added initial hamza.
صَرَّفَ has root ṣ-r-f, with doubled middle radical.
تَقَبَّلَ has root q-b-l, with an initial tāʾ and doubled middle radical.
قَاتَلَ has root q-t-l, with alif after the first radical.
تَقَابَلَ has root q-b-l, with both initial tāʾ and medial alif.
A written consonant repeated by shaddah is not a new original radical. First identify the root; then locate the distinctive pattern letters.
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Separating root from pattern
Five Augmented Triliteral Patterns Without Hamzat al-Wasl
The original radicals and the augmentations must be identified separately:
أَكْرَمَ has root k-r-m, with added initial hamza.
صَرَّفَ has root ṣ-r-f, with doubled middle radical.
تَقَبَّلَ has root q-b-l, with an initial tāʾ and doubled middle radical.
قَاتَلَ has root q-t-l, with alif after the first radical.
تَقَابَلَ has root q-b-l, with both initial tāʾ and medial alif.
A written consonant repeated by shaddah is not a new original radical. First identify the root; then locate the distinctive pattern letters.