In أَحْمَرُ:
- it describes a colour: wasf;
- its form follows أَفْعَلُ: a verb-like pattern.
Because both causes are present, the taught adjective is ghayr munsarif: أَحْمَرُ — أَحْمَرَ — أَحْمَرَ. It has no tanwin and uses fathah in the basic genitive.
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Causes of Ghayr Munsarif: Wasf and the Pattern Af'al
In أَحْمَرُ:
- it describes a colour: wasf;
- its form follows أَفْعَلُ: a verb-like pattern.
Because both causes are present, the taught adjective is ghayr munsarif: أَحْمَرُ — أَحْمَرَ — أَحْمَرَ. It has no tanwin and uses fathah in the basic genitive.