رَضِيَ
Translation: He was pleased.
The final root consonant was wāw; after a kasrah it appears as yāʾ through iʿlāl by substitution. Thus the visible yāʾ should not be mistaken for the original third radical.
الرِّضْوَانُ
Translation: Approval or pleasure.
The wāw is visible in this related verbal noun. Contrast this with رَمَى, a genuinely yāʾ-final root. Similar surface endings can reflect different underlying roots.
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Why رَضِيَ Contains Yāʾ
Full Conjugation of the Wāw-Final Verb رَضِيَ يَرْضَى
رَضِيَ
Translation: He was pleased.
The final root consonant was wāw; after a kasrah it appears as yāʾ through iʿlāl by substitution. Thus the visible yāʾ should not be mistaken for the original third radical.
الرِّضْوَانُ
Translation: Approval or pleasure.
The wāw is visible in this related verbal noun. Contrast this with رَمَى, a genuinely yāʾ-final root. Similar surface endings can reflect different underlying roots.