Chembe ni ndogo.

Ni is the copula here: it links the subject chembe to the description ndogo.

So the structure is:

• chembe = the subject
• ni = is / are
• ndogo = small

In this kind of simple present statement, ni works a lot like English is/are. It does not change for noun class, person, or number in this use.

Swahili does not have articles like English a/an/the.

So chembe can mean things like:

• a particle
• the particle
• sometimes even a more general particle

The exact sense usually comes from context.

In Swahili, adjectives usually agree with the noun class of the noun they describe.

The adjective stem is -dogo = small.
With the noun class used by chembe, the agreeing form is ndogo.

So:

• adjective stem: -dogo
• agreeing form here: ndogo

This is normal agreement, not a random spelling change.

Here chembe behaves like a class 9/10 noun.

That matters because noun class affects agreement:

• adjectives
• demonstratives
• verbs
• possessives

One clue is the adjective form ndogo, which is the expected agreeing form for a class 9/10 noun.

By itself, it may be unclear.

Many class 9/10 nouns have the same form in singular and plural, and the adjective can also stay the same. So chembe ni ndogo may need context to tell you whether it is singular or plural.

To make number clearer, Swahili often uses other agreement words, for example:

• chembe hii ni ndogo = this particle is small
• chembe hizi ni ndogo = these particles are small

So context and agreement elsewhere often tell you the number.

Because kidogo is a different agreement form.

For chembe, the correct agreeing adjective here is ndogo, not kidogo.

Also, kidogo is very often used in other ways, such as meaning a little or as an adjective with a different noun class. So even though both are related to the idea of smallness, they are not interchangeable here.

Correct:

• Chembe ni ndogo.

Not correct for this noun:

• Chembe ni kidogo.

They are different structures:

• chembe ni ndogo = a full sentence = the particle is small
• chembe ndogo = a noun phrase = small particle

So ni is what turns it into a complete statement.

Yes.

This sentence follows a very normal pattern:

• noun + ni + adjective

So:

• chembe = noun
• ni = copula
• ndogo = adjective/predicate

If you are making just a noun phrase, the adjective still comes after the noun:

• chembe ndogo = small particle

That is the normal order in Swahili.

A rough guide is:

CHEM-be ni nDO-go

A few pronunciation notes:

• ch sounds like ch in church
• mb in chembe is pronounced clearly
• nd in ndogo is also pronounced clearly
• Swahili vowels are usually pure and short, not glidey like in English

Stress in Swahili usually falls on the second-to-last syllable of each word, so:

• CHEM-be
• nDO-go

Use si instead of ni:

• Chembe si ndogo. = The particle is not small.

So in this kind of sentence:

• ni = affirmative
• si = negative

Usually, you can just use question intonation:

• Chembe ni ndogo? = Is the particle small?

You can also add je at the beginning:

• Je, chembe ni ndogo?

Both are natural ways to ask the question.

Not in the same way.

Ni is mainly the simple present copula in sentences like this. For other tenses, Swahili usually uses forms of -wa instead.

For example:

• Chembe ilikuwa ndogo. = The particle was small.
• Chembe itakuwa ndogo. = The particle will be small.

So ni is especially important for the basic present-tense pattern.