A lafīf mafrūq root has weak first and last radicals with a sound middle radical separating them. The term mafrūq means “separated.”
وَفَى has root و ف ي: wāw in first position and yāʾ in the last.
وَقَى has root و ق ي with the same arrangement.
Calling these simply “weak-final” would omit an important feature: the first radical is also weak. The more complete morphological diagnosis is lafīf mafrūq.
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Lafīf Mafrūq
The Seven Morphological Classes: Sound, Hamzated, Weak and Doubled
A lafīf mafrūq root has weak first and last radicals with a sound middle radical separating them. The term mafrūq means “separated.”
وَفَى has root و ف ي: wāw in first position and yāʾ in the last.
وَقَى has root و ق ي with the same arrangement.
Calling these simply “weak-final” would omit an important feature: the first radical is also weak. The more complete morphological diagnosis is lafīf mafrūq.