حَمْرَاءُ ← حَمْرَاوَانِ
The feminine final hamzah in ḥamrāʾ becomes wāw before dual endings: ḥamrāwāni / ḥamrāwayni.
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Feminine Hamzah Becomes Wāw
The Dual Noun: Inflection, Maqṣūr, Mamdūd and Iḍāfah
حَمْرَاءُ ← حَمْرَاوَانِ
The feminine final hamzah in ḥamrāʾ becomes wāw before dual endings: ḥamrāwāni / ḥamrāwayni.