In isʿa the visible fatḥa remains from an alif-final weak verb. It is built on weak-letter deletion, not fatḥa.
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Common Error: Misreading Final Fatḥa
The Imperative: Definition, Formation, Hamza, and Building Signs
In isʿa the visible fatḥa remains from an alif-final weak verb. It is built on weak-letter deletion, not fatḥa.