Written forms may change, but the underlying root determines the morphological class.
VerbFirst radicalMiddle radicalFinal radicalClass
وَلِيَوليSeparated doubly weak
طَوَىطويAdjacent doubly weak
أَغْنَىغنيYāʾ-final
سَمَّىسموWāw-final
Both أَغْنَى and سَمَّى end in alif maqṣūrah on the surface. The former derives from final yāʾ and the latter from final wāw, so their categories differ.
Opening interactive controls...
Eight Short Paradigms: Lafīf and Defective Verbs with Morphological Explanations
Written forms may change, but the underlying root determines the morphological class.
VerbFirst radicalMiddle radicalFinal radicalClass
وَلِيَوليSeparated doubly weak
طَوَىطويAdjacent doubly weak
أَغْنَىغنيYāʾ-final
سَمَّىسموWāw-final
Both أَغْنَى and سَمَّى end in alif maqṣūrah on the surface. The former derives from final yāʾ and the latter from final wāw, so their categories differ.