دَلْوٌ → دِلِيٌّ
Translation: Bucket → buckets (the attested plural discussed here).
The noun has a final wāw radical. The plural measure brings together wāws that the rule resolves by turning them into yāʾs and changing the prior vowel. Keep the root consonant concept distinct from the extra elements supplied by a plural pattern.
StageForm
Singularدَلْوٌ
Underlying pluralدُلُوٌّ
Resulting pluralدِلِيٌّ
The two changes must be justified together, not merely memorized as the final spelling.
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Miscellaneous Morphological Explanations: Eight Rules for Wāw, Yāʾ, Alif and Hamzah
دَلْوٌ → دِلِيٌّ
Translation: Bucket → buckets (the attested plural discussed here).
The noun has a final wāw radical. The plural measure brings together wāws that the rule resolves by turning them into yāʾs and changing the prior vowel. Keep the root consonant concept distinct from the extra elements supplied by a plural pattern.
StageForm
Singularدَلْوٌ
Underlying pluralدُلُوٌّ
Resulting pluralدِلِيٌّ
The two changes must be justified together, not merely memorized as the final spelling.