Plural Wāw Is Not Always a Root Radical

Advanced Sarf Application: Ambiguous Forms, Weak-Letter Reasoning and Error Correction

The visible wāw in the past plural is not sufficient proof that the final root radical is wāw.

FormRootIdentification
رَمَىر م يFinal-yāʾ
رَمَوْار م يThird-person masculine plural
دَعَاد ع وFinal-wāw
دَعَوْاد ع وThird-person masculine plural

First distinguish inflectional markers from underlying radicals, then cross-check other forms.