أَوْقَدَ — يُوقِدُ — إِيقَادًا means to light or kindle. It belongs to Form IV, from root و ق د.
The underlying verbal noun إِوْقَادًا has kasrah on its initial hamzah followed by quiescent wāw. Rule 3 changes wāw to yāʾ.
The visible yāʾ in إِيقَادًا is not an original root radical. It results from regular substitution of wāw.
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The Verbal Noun إِيقَادٌ
Weak-Initial Roots: Elision, Substitution, Assimilation and Short Paradigms
أَوْقَدَ — يُوقِدُ — إِيقَادًا means to light or kindle. It belongs to Form IV, from root و ق د.
The underlying verbal noun إِوْقَادًا has kasrah on its initial hamzah followed by quiescent wāw. Rule 3 changes wāw to yāʾ.
The visible yāʾ in إِيقَادًا is not an original root radical. It results from regular substitution of wāw.