Combining root length and augmentation yields four principal groups:
Word / formMeaning / explanation
Triliteral unaugmentedthree radicals, no derivational additions: نَصَرَ.
Triliteral augmentedthree radicals with added letters: اِجْتَنَبَ.
Quadriliteral unaugmentedfour radicals without additions: دَحْرَجَ.
Quadriliteral augmentedfour radicals plus added letters: تَزَلْزَلَ.
The root of تَزَلْزَلَ is z-l-z-l; the leading tāʾ is added. Five visible letters do not imply a five-radical root.
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Verb Classes and the Six Unaugmented Triliteral Patterns
Combining root length and augmentation yields four principal groups:
Word / formMeaning / explanation
Triliteral unaugmentedthree radicals, no derivational additions: نَصَرَ.
Triliteral augmentedthree radicals with added letters: اِجْتَنَبَ.
Quadriliteral unaugmentedfour radicals without additions: دَحْرَجَ.
Quadriliteral augmentedfour radicals plus added letters: تَزَلْزَلَ.
The root of تَزَلْزَلَ is z-l-z-l; the leading tāʾ is added. Five visible letters do not imply a five-radical root.