● Compare fully declinable, diptote, and indeclinable nouns together:
Type
Basic difference
Case examples
Fully declinable muʿrab
All three cases have different forms shown by tanwīn
رَجُلٌ / رَجُلًا / رَجُلٍ
Diptote muʿrab
No tanwīn; the genitive takes fatḥah instead of kasrah, so there are only two forms
زَيْنَبُ / زَيْنَبَ / زَيْنَبَ
Indeclinable noun
Its form does not change when its case changes, so it has only one form
هٰذَا / هٰذَا / هٰذَا
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Practical Exercise: Indeclinable and Diptote Nouns
● Compare fully declinable, diptote, and indeclinable nouns together:
Type
Basic difference
Case examples
Fully declinable muʿrab
All three cases have different forms shown by tanwīn
رَجُلٌ / رَجُلًا / رَجُلٍ
Diptote muʿrab
No tanwīn; the genitive takes fatḥah instead of kasrah, so there are only two forms
زَيْنَبُ / زَيْنَبَ / زَيْنَبَ
Indeclinable noun
Its form does not change when its case changes, so it has only one form
هٰذَا / هٰذَا / هٰذَا