Lafīf mafrūq has weak first and third radicals separated by a sound middle radical: و ل ي. Lafīf maqrūn has adjacent weak middle and final radicals: ط و ي. A defective verb has a weak final radical, which may surface as wāw, yāʾ, or alif.
ClassRootExample
Separated doubly weakو ل يوَلِيَ
Adjacent doubly weakط و يطَوَى
Yāʾ-final defectiveغ ن يأَغْنَى
Wāw-final defectiveس م وسَمَّى
Classify by the underlying root, not simply the written final letter.
Opening interactive controls...
Eight Short Paradigms: Lafīf and Defective Verbs with Morphological Explanations
Lafīf mafrūq has weak first and third radicals separated by a sound middle radical: و ل ي. Lafīf maqrūn has adjacent weak middle and final radicals: ط و ي. A defective verb has a weak final radical, which may surface as wāw, yāʾ, or alif.
ClassRootExample
Separated doubly weakو ل يوَلِيَ
Adjacent doubly weakط و يطَوَى
Yāʾ-final defectiveغ ن يأَغْنَى
Wāw-final defectiveس م وسَمَّى
Classify by the underlying root, not simply the written final letter.