Specification (Tamyiz) in Arabic

In Brief

Arabic tamyiz (التمييز) is usually an indefinite noun in the accusative case that removes ambiguity from a number, quantity, comparison, or whole statement. In عندي عشرون كتابًا (“I have twenty books”), كتابًا tells you what is being counted; in هي أكثر مني خبرةً (“She is more experienced than I am”), خبرةً tells you in what respect she is “more.”

Overview

The word تمييز literally suggests distinguishing or making something clear. Grammatically, it names a noun that supplies information left vague by an earlier word or relationship. A noun is a word for a person, thing, place, substance, or idea; here, examples include طالب (“student”), ماء (“water”), and خبرة (“experience”). The clarifying noun itself is the تمييز, while the unclear expression it explains is the مميَّز.

This pattern becomes especially useful around B1, when Arabic sentences include larger numbers, measurements, comparative forms such as أكبر (“bigger/older”), and verbs such as ازداد (“increase”). English usually expresses the same idea through ordinary word order or a preposition: “twenty students,” “older in age,” or “increased in knowledge.” Arabic often marks the clarifying noun with the accusative case (النصب), a grammatical form commonly shown by a final ـَ or ـًـا sound in fully vowelled formal Arabic.

Tamyiz belongs mainly to Modern Standard Arabic and formal writing or speech. Case endings are often not pronounced in everyday conversation, but the construction itself remains important for reading accurately and writing standard Arabic.

How It Works

The basic pattern

A typical tamyiz has three features:

1. It comes after something whose meaning is incomplete or open to more than one interpretation.
2. It is normally indefinite: كتابًا (“a book/books as a category”), not الكتابَ (“the book”).
3. In its core form, it is accusative: علمًا، سنًّا، طالبًا، خبرةً.

The two broad types are easiest to understand by asking where the ambiguity lies.

Type	What is unclear?	Pattern	Example	Meaning
تمييز الذات or تمييز الملفوظ	A stated number, measure, weight, area, or quantity word	quantity + clarifying noun	عشرون طالبًا	twenty students
تمييز النسبة or تمييز الملحوظ	The relationship expressed by the whole clause	clause + clarifying noun	ازداد الطالب علمًا	The student increased in knowledge.

ملفوظ means that the vague quantity is explicitly “spoken” in the sentence. ملحوظ means that the ambiguity is understood from the sentence as a whole rather than attached to one concrete measure word.

Tamyiz after numbers

The noun following a cardinal number (a number used for counting) does not always take the same form. The core B1 rule is that after 11–99, the counted noun is singular and accusative.

Number range	Form of the counted noun	Example	Meaning
1–2	Usually the noun comes first; the number behaves like an adjective	كتابٌ واحدٌ / كتابان اثنان	one book / two books
3–10	Plural and genitive	ثلاثةُ كتبٍ	three books
11–99	Singular and accusative	أحدَ عشرَ كتابًا / عشرون كتابًا	eleven books / twenty books
100, 1,000, and their multiples	Singular and genitive, usually in an idafa construction	مئةُ كتابٍ / ألفُ صفحةٍ	one hundred books / one thousand pages

The genitive case (الجر) is the form commonly used after a preposition or as the second part of an idafa (إضافة), a noun-to-noun expression such as “a hundred of books.” Arabic does not actually insert “of” in مئة كتابٍ, but that relationship explains the genitive ending.

This means that not every noun which specifies a number is visibly accusative. Traditional descriptions may discuss all of these counted nouns under number specification, but كتابًا after 11–99 is the clearest model of accusative tamyiz. Gender agreement inside Arabic number expressions is a separate topic; tamyiz determines the form and case of the counted noun, not every part of the numeral itself.

Tamyiz after measures and quantity expressions

A unit of weight, volume, area, or other measure is incomplete until the substance or item is named:

• اشتريتُ لترًا حليبًا — “I bought a litre of milk.”
• عندي مترٌ حريرًا — “I have a metre of silk.”
• امتلأ الكوب ماءً — “The cup filled with water.”

Formal Arabic often has more than one way to express the same quantity. The clarifying noun may be accusative, genitive in an idafa, or introduced by مِن (“of/from”):

Construction	Example	Literal structure
Accusative tamyiz	لترًا حليبًا	a litre, milk (as specification)
Idafa	لترَ حليبٍ	a litre of milk
مِن phrase	لترًا من الحليبِ	a litre of the milk/milk

The idafa and مِن patterns are especially common in present-day practical language. With مِن, the noun is genitive because it follows a preposition, not because it is accusative tamyiz.

Tamyiz after كم

Interrogative كم means “how many?” Its specification is normally singular and accusative:

كم كتابًا قرأتَ؟

“How many books did you read?”

English uses a plural after “how many,” so the Arabic singular كتابًا is easy to miss. The number of books may be plural in reality, but the grammatical form after interrogative كم is singular.

Tamyiz after comparatives and superlatives

The pattern أفعل can express a comparison: أكبر (“bigger”), أكثر (“more”), أقلّ (“less”), أفضل (“better”), and similar forms. A following tamyiz states the precise respect in which the comparison applies:

• هو أكبر مني سنًّا — “He is older than I am,” literally “greater than me in age.”
• هذه الخطة أقلُّ تكلفةً — “This plan is less costly,” literally “less in cost.”
• مريم أكثرُ خبرةً من زميلها — “Maryam is more experienced than her colleague.”

Without سنًّا, أكبر مني could mean physically bigger, older, greater in rank, or more important. The tamyiz removes that uncertainty.

Tamyiz that clarifies a whole statement

Some verbs and descriptions express change, fullness, excellence, or intensity but leave one question unanswered: change in what, full of what, or excellent in what respect?

• ازداد علماً — “He increased in knowledge.”
• امتلأ الخزان ماءً — “The tank filled with water.”
• طاب محمد نفسًا — “Muhammad felt content,” more literally “Muhammad became good in spirit.”
• اشتعل الرأس شيبًا — “The head blazed with grey hair,” a vivid formal expression.

In these sentences, the tamyiz does not merely label a preceding number. It interprets the relationship expressed by the entire clause. English often needs “in,” “with,” or a different verb altogether.

Recognising the accusative form

In fully vowelled text, an indefinite singular noun usually shows accusative tanwin (a doubled short-vowel ending):

Base form	As tamyiz	Example
كتاب	كتابًا	عشرون كتابًا
طالب	طالبًا	أحد عشر طالبًا
خبرة	خبرةً	أكثر خبرةً
علم	علمًا	ازداد علمًا

The extra ا written with many words, as in كتابًا, supports the accusative tanwin in spelling. It is not added after ة, so write خبرةً, not خبرةًا. In unvowelled text these appear as كتابا or, more commonly where tanwin is omitted but the supporting alif remains, كتابًا when partially vowelled; pronunciation at a pause may also hide the final case sound. Syntax, not visible vowels alone, is therefore the best guide.

Examples in Context

Arabic	English	Note
في الصف اثنا عشر طالبًا.	There are twelve students in the class.	12 + singular accusative tamyiz
قرأتُ عشرين صفحةً اليوم.	I read twenty pages today.	20 + singular accusative tamyiz
يضمّ الفندق خمسًا وثلاثين غرفةً.	The hotel has thirty-five rooms.	35 + singular accusative tamyiz
حضر ثلاثةُ طلابٍ فقط.	Only three students attended.	With 3–10, the noun is plural and genitive
تحتوي المكتبة على مئةِ ألفِ كتابٍ.	The library contains one hundred thousand books.	After ألف, the counted noun is singular genitive
كم كتابًا قرأتَ هذا الشهر؟	How many books did you read this month?	Interrogative كم + singular accusative
اشتريتُ كيلوغرامًا تفاحًا.	I bought a kilogram of apples.	Measure followed by accusative specification
اشترينا لترًا من الحليبِ.	We bought a litre of milk.	Common مِن alternative; الحليب is genitive
هو أكبرُ من أخيه سنًّا.	He is older than his brother.	سنًّا specifies the point of comparison
ليلى أكثرُ الفريق خبرةً.	Layla is the most experienced member of the team.	خبرةً explains أكثر
هذا الطريق أقصرُ مسافةً.	This road is shorter in distance.	مسافةً states in what respect it is shorter
ازدادت المدينة سكانًا.	The city increased in population.	Clause-level tamyiz after a verb of increase
ازداد الباحث علمًا وخبرةً.	The researcher grew in knowledge and experience.	Two coordinated accusative specifications
امتلأت القاعة ضيوفًا.	The hall filled with guests.	ضيوفًا clarifies what filled it
فاض الكوب ماءً.	The cup overflowed with water.	ماءً clarifies the content

Common Mistakes

Using a plural noun after 11–99

• Wrong: عندي عشرون كتبًا.
• Right: عندي عشرون كتابًا.
• Why: After numbers from 11 through 99, the counted noun is singular and accusative. English says “twenty books,” but Arabic uses singular كتابًا in this pattern.

Making every counted noun accusative

• Wrong: قرأتُ ثلاثةَ كتبًا.
• Right: قرأتُ ثلاثةَ كتبٍ.
• Why: The accusative rule does not cover all numbers. After 3–10, the counted noun is plural and genitive. After 100 and 1,000, it is singular and genitive: مئةُ كتابٍ، ألفُ كتابٍ.

Adding the definite article

• Wrong: هو أكبر مني السنَّ.
• Right: هو أكبر مني سنًّا.
• Why: Ordinary tamyiz is indefinite. If you want to refer to a definite set, Arabic usually chooses a different construction rather than simply adding الـ to the tamyiz.

Copying English “how many” agreement

• Wrong: كم كتبًا قرأتَ؟
• Right: كم كتابًا قرأتَ؟
• Why: Interrogative كم normally takes a singular accusative specification, even though English uses a plural count noun.

Confusing tamyiz with a description of someone’s state

• Wrong analysis: Calling مسرعًا in دخل الرجل مسرعًا (“The man entered quickly/hurrying”) a tamyiz.
• Right analysis: مسرعًا is a حال (a circumstantial expression describing someone’s state during an action).
• Why: A حال answers “how or in what state?” and often uses a descriptive word. Tamyiz resolves ambiguity about a quantity or relationship: الرجل أكبر سنًّا answers “greater in what respect?”

Forgetting the written accusative alif

• Wrong: قرأت عشرين كتابً
• Right: قرأت عشرين كتابًا
• Why: With a regular noun such as كتاب, accusative tanwin is written over an added alif. Words ending in ة, however, do not take that alif: عشرين صفحةً.

Usage Notes

Case endings are clearest in carefully read or fully vowelled Modern Standard Arabic. In ordinary unvowelled writing, you may see عشرون طالبا without the tanwin mark, although the final alif still points to the accusative form. In connected formal speech, طالبًا is pronounced approximately with the ending -an; when pausing, speakers often reduce or omit case endings according to reading style.

Everyday dialects preserve many of the meanings but generally do not preserve Classical/Standard Arabic case marking. A speaker may use a number plus noun, a preposition equivalent to “in,” or a locally preferred comparison. Learn the accusative pattern for formal Arabic, the language of edited prose, news, essays, and formal presentations, without expecting all spontaneous conversation to pronounce ـًا.

With measurements, alternatives are not merely theoretical. كيلوغرامٌ من التفاح and an idafa such as كيلوغرامُ تفاحٍ are often more natural in contemporary practical contexts than a fully inflected accusative specification. After 11–99, however, the direct singular accusative pattern remains central: خمسة عشر كتابًا.

Word order can change emphasis, but tamyiz normally follows the expression it clarifies. Keeping أكثر خبرةً or عشرون طالبًا together makes the relationship immediately clear to the reader.

Beyond the Basics / Advanced Use

Original and transformed tamyiz

Grammarians distinguish tamyiz that has no obvious earlier sentence source from transformed tamyiz (التمييز المحوَّل), whose meaning can be traced to a subject, object, or other element in a related construction. For example:

• طاب محمد نفسًا can be related in meaning to طابت نفسُ محمد — “Muhammad’s spirit became content.”
• فجّرنا الأرض عيونًا can be understood through فجّرنا عيونَ الأرض — “We caused the springs of the earth to gush forth.”

The transformation shifts attention. Instead of making “Muhammad’s spirit” or “the earth’s springs” the main noun phrase, Arabic presents a broader statement and then uses an accusative noun to reveal the relevant respect. You do not need to reconstruct a hidden sentence every time you read tamyiz, but this analysis explains why clause-level examples feel different from simple counting.

When مِن can replace tamyiz

Some clause-level specifications allow a phrase with مِن without a major change in basic meaning:

• ازداد علمًا — “He increased in knowledge.”
• ازداد من العلمِ — “He gained more knowledge,” with a partitive or cumulative shade depending on context.

The two structures are not mechanically interchangeable everywhere. سنًّا in أكبر سنًّا is the concise standard way to identify the dimension of comparison, while أكبر من حيث السنّ (“greater with respect to age”) is a more explicit analytical alternative.

Interrogative and exclamatory كم

The كم used for a real question normally has singular accusative tamyiz: كم يومًا بقيتَ؟ (“How many days did you stay?”). Formal Arabic also has exclamatory or declarative كم, meaning roughly “how many” or “so many,” as in كم من كتابٍ قرأتُ! (“How many books I have read!”). Its specification is commonly genitive, often after مِن, and should not be confused with the basic interrogative pattern.

Tamyiz versus حال

Both tamyiz and حال are often indefinite and accusative, so the ending alone cannot identify them. Compare:

• عاد المسافر متعبًا — “The traveller returned tired.” متعبًا describes the traveller’s condition and is حال.
• المسافر أكثر خبرةً — “The traveller is more experienced.” خبرةً names the dimension of “more” and is tamyiz.

A useful test is to ask whether the word describes an entity during the action or resolves an incomplete quantity/relationship. The test is a guide, not a substitute for reading the whole sentence.

Practice Tips

1. Sort numbers by range. Make four columns for 1–2, 3–10, 11–99, and 100/1,000. Add one noun such as كتاب to each range and say the full phrase aloud: كتاب واحد، ثلاثة كتبٍ، عشرون كتابًا، مئة كتابٍ.
2. Complete vague comparisons. Take أكبر، أكثر، أقلّ، أفضل and add a precise dimension: سنًّا، خبرةً، تكلفةً، جودةً. Then translate the idea naturally rather than word for word.
3. Look for the ambiguity first. When reading, underline the number, measure, comparative, or vague verb; then circle the noun that answers “how many of what?”, “how much of what?”, or “in what respect?” This makes tamyiz easier to recognise even when vowels are absent.

Related Concepts

• Prerequisite: Noun Cases (I'rab) — review the nominative, accusative, and genitive endings needed to recognise tamyiz and the number-based exceptions.