Ukoo wetu ni mkubwa.

Ukoo usually means clan, lineage, or extended family rather than just a small household.

So Ukoo wetu ni mkubwa is more like:

• Our clan is big
• Our extended family is large

If the meaning shown to you is simply Our family is big, that is fine, but ukoo often feels broader than English family.

In Swahili, possessives normally come after the noun.

So:

• ukoo wetu = our clan / our family
• literally, something like clan our

This is normal Swahili word order.

Ni is the linking word meaning is, am, or are in sentences like this.

So:

• Ukoo wetu ni mkubwa = Our family is big

A helpful thing to remember is that ni does not change for different subjects the way English does:

• Mimi ni... = I am...
• Yeye ni... = He/She is...
• Sisi ni... = We are...

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

So ukoo wetu can naturally mean our family without needing a separate word for the.

The possessive wetu already makes the phrase specific enough.

Because wetu has to agree with the noun class of ukoo.

Swahili nouns belong to grammatical classes, and words like possessives often change form to match them.
Ukoo takes the possessive form wetu, so:

• ukoo wetu = our clan/family

This may feel strange at first, because English possessives do not change this way, but in Swahili this kind of agreement is very common.

The basic adjective stem is -kubwa, meaning big, large, great, or sometimes important.
It takes a class prefix to agree with the noun.

Since ukoo belongs to a noun class that uses m- here, the adjective becomes:

• m-kubwa = mkubwa

So:

• ukoo wetu ni mkubwa = our family is big

This is another example of noun-class agreement.

Because ukoo is a singular noun even though it refers to a group of people.

English does something similar with words like family or team. A family has many members, but the noun itself can still be singular.

That is why the sentence uses singular agreement:

• ukoo wetu
• ni mkubwa

Yes. Mkubwa can mean several related things depending on context, such as:

• big
• large
• great
• important
• senior / older

In this sentence, the natural meaning is large in size or number, so Our family is big.

Yes, you could.

• familia yetu ni kubwa = our family is big

But there is a nuance:

• familia is the everyday word for family
• ukoo often suggests extended family, clan, or lineage

So the two are similar, but ukoo can sound broader.

A simple way to say it is:

• u-KO-o

The stress is on the next-to-last syllable, which is very common in Swahili. Also, pronounce the vowels clearly.

So do not reduce the vowels the way English often does. Keep them clean and distinct.

If you want the full sentence Our family is big, keep ni.

• Ukoo wetu ni mkubwa = Our family is big

If you remove ni, the phrase may sound more like our big family/clan rather than a complete statement.

So for this meaning, ni is the safest and clearest choice.

You would say:

• Ukoo wetu si mkubwa.

Here, si is the negative form used in this kind of sentence.

So:

• ni mkubwa = is big
• si mkubwa = is not big