● All declinable nouns are divided into two further categories:
1. fully declinable nouns (munṣarif): about 85 percent of Arabic nouns. They accept tanwīn in all three cases, as in كِتَابٌ / كِتَابًا / كِتَابٍ.
2. diptote nouns (ghayr munṣarif): about 13 percent of Arabic nouns. They do not accept tanwīn at the end or kasrah in the genitive. Their ending always carries a single vowel mark.
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Difference Between Fully Declinable and Diptote Nouns
Declinable and Indeclinable Nouns: Fully Declinable and Diptote
● All declinable nouns are divided into two further categories:
1. fully declinable nouns (munṣarif): about 85 percent of Arabic nouns. They accept tanwīn in all three cases, as in كِتَابٌ / كِتَابًا / كِتَابٍ.
2. diptote nouns (ghayr munṣarif): about 13 percent of Arabic nouns. They do not accept tanwīn at the end or kasrah in the genitive. Their ending always carries a single vowel mark.