ضَمُّ مَا قَبْلَهَا فِي جَمْعِ الْمُذَكَّرِ.
Translation: The letter before it is given ḍamma in the masculine plural.
The plural wāw is omitted before emphatic nūn; the ḍamma before nūn marks the underlying masculine plural. Contrast uktubanna (singular) and uktubunna (plural).
Opening interactive controls...
Masculine Plural: Dropped Wāw
The Two Emphatic Nūns: Forms and Rules
ضَمُّ مَا قَبْلَهَا فِي جَمْعِ الْمُذَكَّرِ.
Translation: The letter before it is given ḍamma in the masculine plural.
The plural wāw is omitted before emphatic nūn; the ḍamma before nūn marks the underlying masculine plural. Contrast uktubanna (singular) and uktubunna (plural).