The root of يَسْأَلُ is س أ ل. The optional lightening proceeds in stages:
1. Sīn is quiescent (سْ), while hamzah carries fatḥah (أَ).
2. Transfer the fatḥah to sīn, producing سَ.
3. Drop hamzah, yielding يَسَلُ.
The form remains analyzable as a hamzated-middle verb. Its reduced spelling is not evidence for a new two-letter root, and the standard unreduced يَسْأَلُ must not be altered indiscriminately.
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Step-by-Step Analysis of يَسْأَلُ
Rules of Hamzated Forms: Lightening, Substitution, Elision and Short Paradigms
The root of يَسْأَلُ is س أ ل. The optional lightening proceeds in stages:
1. Sīn is quiescent (سْ), while hamzah carries fatḥah (أَ).
2. Transfer the fatḥah to sīn, producing سَ.
3. Drop hamzah, yielding يَسَلُ.
The form remains analyzable as a hamzated-middle verb. Its reduced spelling is not evidence for a new two-letter root, and the standard unreduced يَسْأَلُ must not be altered indiscriminately.