A lafīf root contains two weak radicals. It is not enough to identify only one weak letter: their positions relative to one another determine the subtype.
وَفَى comes from و ف ي, with weak first and final radicals.
طَوَى comes from ط و ي, with weak middle and final radicals.
In the first pattern a sound radical separates the weak ones; in the second the weak radicals are adjacent. These are known respectively as lafīf mafrūq and lafīf maqrūn.
Opening interactive controls...
Lafīf: Two Weak Radicals
The Seven Morphological Classes: Sound, Hamzated, Weak and Doubled
A lafīf root contains two weak radicals. It is not enough to identify only one weak letter: their positions relative to one another determine the subtype.
وَفَى comes from و ف ي, with weak first and final radicals.
طَوَى comes from ط و ي, with weak middle and final radicals.
In the first pattern a sound radical separates the weak ones; in the second the weak radicals are adjacent. These are known respectively as lafīf mafrūq and lafīf maqrūn.