-wili

Two with -wili

Level 1

In Swahili, the number "two" is based on the root -wili. Unlike English, it must take a prefix that matches the noun it describes.

How It Works

In Swahili, the numbers 1 through 5, and 8, act like adjectives and require noun-class agreement.

Common Agreement Forms:

  • Class 2 (People): wa- + -wili = wawili (watu wawili / two people)
  • Class 4 (Trees/Inanimates): mi- + -wili = miwili (miti miwili / two trees)
  • Class 6 (Fruits/Concepts): ma- + -wili = mawili (matunda mawili / two fruits)
  • Class 8 (Artifacts): vi- + -wili = viwili (vitabu viwili / two books)
  • Class 16 (Locatives): pa- + -wili = pawili (mahali pawili / two places)

The N-Class Exception (mbili):
When attached to Class 10 (N-class nouns, which include many everyday objects), the underlying N- prefix forces the 'w' to mutate into 'mb'. Therefore, N- + -wili becomes mbili (e.g., nyumba mbili / two houses). Because most Class 11 (U-Class) nouns form their plurals in Class 10, they also use mbili (e.g., funguo mbili / two keys).

The Animacy Rule:
Swahili enforces a strict animacy rule where all animate nouns (including animals) take Class 1/2 agreement regardless of their inherent noun class. Therefore, animals use wawili (e.g., mbwa wawili / two dogs), not mbili. You can learn more about this in animal agreement choices.

Word Order:
Numbers always follow the noun. When there are other adjectives, the standard default order is Noun + Adjective + Numeral. For example, nyumba kubwa mbili (two big houses).

Beginners often think mbili is the universal word for "two" because it is used when counting abstractly (moja, mbili, tatu). However, when describing actual objects, you must use the correct prefix with the root -wili. In contrast, other numbers (like 6, 7, 9, and 10) are invariable and do not take agreement prefixes. Note that for compound numbers ending in 1-5 or 8, the formal rule is that the final digit still takes the agreement prefix (e.g., watu kumi na wawili / twelve people). However, in everyday colloquial Swahili, speakers frequently treat compound numbers as invariable and simply say watu kumi na mbili.

Do Not Spread the Mutation:
Nyumba mbili has the special N-class shape mbili of -wili. Compare nyumba tatu and nyumba nane: these numeral stems do not acquire a new pronounced nasal or the mb- beginning of mbili. Learn mbili as the relevant agreement form, not as a sound-change recipe for every numeral.

Examples (4)

  1. Nina watoto wawili.

    I have two children.

    Word by Word: I have children two.

    Uses the Class 2 prefix wa- to agree with watoto (children).

  2. Alinunua vitabu viwili.

    He/she bought two books.

    Word by Word: He/she bought books two.

    Uses the Class 8 prefix vi- to agree with vitabu (books).

  3. Lete chupa mbili za maji.

    Bring two bottles of water.

    Word by Word: Bring bottles two of water.

    Uses the Class 10 form mbili to agree with chupa (bottles).

  4. Kuna miti miwili hapa.

    There are two trees here.

    Word by Word: There are trees two here.

    Uses the Class 4 prefix mi- to agree with miti (trees).

Common Mistakes

  • Using 'mbili' for all nouns.

    Nina watoto mbili.
    Nina watoto wawili.

    'Mbili' is only used for counting abstractly (1, 2, 3) or for Class 10 (N-class) nouns. For other nouns, you must use the correct prefix with the root -wili.

  • Putting the number before the noun.

    Alinunua viwili vitabu.
    Alinunua vitabu viwili.

    In Swahili, numbers and adjectives must always come after the noun they describe.

How It Connects

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

-wiliLevel 1Two with -wili

Learn This First

To use the number '-wili' (two), you must understand that it is a variable number that changes its prefix based on the noun class of the object being counted. This requires knowledge of the noun class system, the rules for agreement across a sentence, and the word order where modifiers follow the noun.

Words in This Pattern

wili