Four connected features identify a quadriliteral pattern: root, augmentation, verb paradigm and verbal noun.
بَعْثَرَ/بَعْثَرَة has four radicals without augmentation.
اِبْرَنْشَقَ/اِبْرِنْشَاق adds hamza and nūn.
اِقْشَعَرَّ/اِقْشِعْرَار adds hamza and doubles the final radical.
تَسَرْبَلَ/تَسَرْبُل adds initial tāʾ.
Transitivity must also be respected: baʿthara commonly acts on an object, while the other source examples describe a state or event experienced by their subject.
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A unified account of all four forms
The Four Unaugmented and Augmented Quadriliteral Patterns
Four connected features identify a quadriliteral pattern: root, augmentation, verb paradigm and verbal noun.
بَعْثَرَ/بَعْثَرَة has four radicals without augmentation.
اِبْرَنْشَقَ/اِبْرِنْشَاق adds hamza and nūn.
اِقْشَعَرَّ/اِقْشِعْرَار adds hamza and doubles the final radical.
تَسَرْبَلَ/تَسَرْبُل adds initial tāʾ.
Transitivity must also be respected: baʿthara commonly acts on an object, while the other source examples describe a state or event experienced by their subject.