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Arabic Numerals & Counting — Arabic Grammar

🔢 Arabic Numbers (الأعداد): The Complex Agreement Rules

Counting in Arabic is famously complex due to a unique grammatical phenomenon called "reverse agreement" or "chiasmus". The gender of the number often flips to be the opposite of the item being counted, governed by strict category rules.

The Ruleset & Syntax Guidelines

  • Numbers 1 and 2: These numbers behave as simple adjectives. They follow the noun they count and match it perfectly in gender and case (e.g., kitābun wāḥidun).
  • Numbers 3 through 10 (Reverse Gender): These numbers trigger reverse agreement. If the noun counted is masculine singular, the number must take the feminine Ta Marbuta ending. The noun is pluralized and put in the Genitive case.
  • Numbers 11 through 99: These numbers require the counted noun to be in the singular Accusative case (-an), acting as a specifier (Tamyiz).

Learning Hub tip

For numbers 3-10, always look at the singular form of the noun to determine its true gender before applying the opposite gender to the number.

📝 Analytical Examples

ثَلاثَةُ كُتُبٍ (Ṯalāṯatu kutubin) - Three books
Analysis: The noun is "books" (singular masculine kitāb). Therefore, the number "three" takes the feminine form ṯalāṯatu (with Ta Marbuta). "Kutubin" is in the genitive plural.
Academic Note: This is a classic Idafa-like construct where the number acts as the first term and the plural noun is the second term in the genitive.

ثَلاثُ سَيَّارَاتٍ (Ṯalāṯu sayyārātin) - Three cars
Analysis: The noun is "cars" (singular feminine sayyārah). Therefore, the number "three" takes the masculine form ṯalāṯu (without Ta Marbuta) preceding the genitive plural.
Academic Note: Reverse agreement is the standard pattern for numbers 3-10, forming a central part of formal standard counting syntax.

Related Vocabulary

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