cái

Classifier for Things

Level 1

Cái is the most common "measure word" in Vietnamese, used for almost all inanimate objects.

How It Works

In English, we say "two tables" or "this table". In Vietnamese, for most nouns, you need to use a classifier before the noun when counting or pointing (though some non-classified nouns like days or minutes are exceptions).

1. The Default Classifier
Cái is the default classifier for inanimate, physical objects. If you don't know the specific classifier for an inanimate object, you can usually fall back on cái. While it is grammatically incorrect to use it as the primary classifier for living things, it is sometimes used before people's names for emphasis or affection. Note that this is highly informal and strictly used for females (children, younger women, or close peers), and never for elders, in formal settings, or for males (the male equivalent is thằng) (e.g., cái Lan).

  • Counting: Number + cái + Noun (e.g., hai cái bàn = two tables)
  • Pointing: cái + Noun + Demonstrative (e.g., cái bàn này = this table)
  • Standalone Pronoun: When the context is clear, the noun can be dropped, allowing cái to act as a pronoun (e.g., cái này = this one, cái kia = that one, cái gì = what thing).

2. Creating Abstract Nouns
You can place cái before an adjective or a verb to turn it into an abstract noun. For example, đẹp (beautiful) becomes cái đẹp (beauty), and chết (to die) becomes cái chết (death).

3. Adding Emphasis
In casual speech, cái can be placed before another classifier to add strong emotional emphasis (e.g., cái con mèo này = this darn cat, or cái người này = this person!). Note that you cannot use emphatic cái before the classifier cái itself (e.g., you cannot say cái cái bàn này).

4. Single Quick Actions
You can place một cái after a verb to indicate a single, quick instance of an action (e.g., nhìn một cái = take a quick look, or nghỉ một cái = take a quick break).

5. Other Meanings
Be aware that cái can also be an adjective meaning 'female' for animals (e.g., chó cái = female dog) — though note the major exception for birds and fowl, which use mái instead (e.g., gà mái = hen) — or 'main/primary' (e.g., đường cái = main road, ngón tay cái = thumb). This is different from its use as a classifier.

Examples (5)

  1. Tôi muốn mua hai cái bàn này.

    I want to buy these two tables.

    Word by Word: I want buy two classifier table this.

    This shows the standard counting and pointing frame. 'Cái' sits directly before the noun 'bàn'.

  2. Cái áo kia rất đẹp.

    That shirt is very beautiful.

    Word by Word: Classifier shirt that very beautiful.

    When pointing out a specific object with 'kia' (that), the classifier 'cái' is required.

  3. Cho tôi một cái.

    Give me one (of those).

    Word by Word: Give me one classifier.

    If the object is already known from context, you can drop the noun and just use the number and classifier.

  4. Cái đẹp nằm ở tâm hồn.

    Beauty lies in the soul.

    Word by Word: Classifier beautiful lie at soul.

    Here, 'cái' is used to turn the adjective 'đẹp' (beautiful) into the abstract noun 'cái đẹp' (beauty).

  5. Cái con chó này ồn ào quá!

    This (darn) dog is so noisy!

    Word by Word: Classifier classifier dog this noisy too!

    In casual speech, 'cái' can be placed before another classifier ('con') to add strong emotional emphasis. Note that this structure frequently carries a frustrated, annoyed, or derogatory tone.

Common Mistakes

  • Forgetting to use a classifier when counting or pointing at objects.

    Tôi có hai bàn.
    Tôi có hai cái bàn.

    English doesn't use measure words for most nouns, but Vietnamese requires a classifier like 'cái' when a number or demonstrative is attached to a noun.

  • Using 'cái' as the primary classifier for people or animals.

    Tôi thấy một cái chó.
    Tôi thấy một con chó.

    While 'cái' is the default for inanimate objects, animals require the classifier 'con', and people require 'người' or specific kinship terms. Although 'cái' can be used before these classifiers for emphasis (like 'cái con chó này'), it cannot replace them as the primary classifier.

How It Connects

Tap a pattern to see what it builds on and what it leads to.

cáiLevel 1Classifier for Things

Learn This First

To understand 'cái', a learner must first grasp the fundamental concept of classifiers in Vietnamese and how they function as a substitute for articles found in Western languages.

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Words in This Pattern

cái