1. Confirm whether the word has the taught صيغة منتهى الجموع form.
2. Do not classify every broken plural alike: مَسَاجِدُ differs from كُتُبٌ.
3. Remember that a singular lexical item may still be diptote because of this form: طَمَاطِمُ، جَمَاشِيرُ.
4. Apply the familiar al/idafah genitive exception when present.
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Cause of Ghayr Munsarif: Sighat Muntaha al-Jumu'
1. Confirm whether the word has the taught صيغة منتهى الجموع form.
2. Do not classify every broken plural alike: مَسَاجِدُ differs from كُتُبٌ.
3. Remember that a singular lexical item may still be diptote because of this form: طَمَاطِمُ، جَمَاشِيرُ.
4. Apply the familiar al/idafah genitive exception when present.