Mshipa ni mdogo.

Ni is the copula, the word used for is / are / am in simple statements like this.

So:

• Mshipa ni mdogo = The vein is small

It links the subject mshipa with the description mdogo.

Because adjectives in Swahili usually agree with the noun class of the noun they describe.

The adjective stem here is -dogo, meaning small.
Since mshipa belongs to a noun class that takes m- in the singular, the adjective becomes:

• m-dogo = mdogo

So the m- is an agreement prefix.

Mshipa is in the m-mi noun class, usually called Class 3/4:

• singular: mshipa
• plural: mishipa

This class often has:

• singular nouns beginning with m-
• plural nouns beginning with mi-

Because of that, other words connected to the noun often change too.

The plural is:

• Mishipa ni midogo

Breakdown:

• mshipa → mishipa
• mdogo → midogo

So the adjective also changes to match the plural noun class.

Yes, but it means something different.

• Mshipa ni mdogo = The vein is small
• Mshipa mdogo = a small vein or the small vein

So:

• with ni = a full sentence
• without ni = a noun phrase

This is a very important difference in Swahili.

Swahili usually does not use articles like English a or the.

So mshipa can mean:

• a vein
• the vein
• sometimes just vein, depending on context

You understand which one is meant from the situation, not from a separate article.

A simple pronunciation guide is:

• mshipa → mshi-pa
• ni → nee
• mdogo → mdo-go

A few helpful points:

• sh sounds like the sh in shoe
• msh and md are real consonant clusters in Swahili, so you pronounce the m
• stress in Swahili is usually on the next-to-last syllable

So you would roughly stress:

• MSHIpa
• MDOgo

Usually here it means small in size, amount, or degree. But in other contexts, -dogo can also mean things like little, minor, or even younger.

For example:

• kaka mdogo = younger brother
• nyumba ndogo = small house

In Mshipa ni mdogo, the most natural meaning is physical smallness.

You replace ni with si:

• Mshipa si mdogo = The vein is not small

So for this kind of simple identification or description sentence:

• ni = is
• si = is not

In this type of sentence, ni stays the same. It does not change to match the noun.

So you get:

• Mshipa ni mdogo = The vein is small
• Mishipa ni midogo = The veins are small

The noun and adjective change, but ni stays ni.

The normal order is:

• noun + ni + adjective

So:

• Mshipa ni mdogo

That is the standard way to say The vein is small.

If you change the order, you usually change the meaning or make the sentence sound unnatural to a learner’s ear. It is best to learn this pattern as a fixed basic structure.

Yes. Mshipa is the subject, and mdogo is the description of that subject.

So the structure is:

• Mshipa = subject
• ni = linking verb
• mdogo = predicate adjective

This is very similar to English The vein is small, even though the grammar details are different.