Jiko letu ni safi.

Because jiko belongs to noun class 5 in Swahili, and possessives must agree with the noun class.

The basic possessive stem for our is -etu.
To match jiko, Swahili adds the class 5 agreement prefix l-, giving:

l- + -etu = letu

So:

• jiko letu = our kitchen/stove

If the noun were from a different class, the form of our would change. For example:

• kitabu chetu = our book
• nyumba yetu = our house

So the reason is agreement with the noun class.

Jiko is a class 5 singular noun. Its plural is usually majiko, which is class 6.

This matters because many words that go with the noun must agree with its class, especially:

• possessives
• some adjectives
• demonstratives
• verbs in many sentences

In this sentence, the main place where you see this is in:

• jiko letu = our kitchen/stove

The possessive changes because jiko is class 5.

A useful pair to remember:

• jiko letu = our kitchen/stove
• majiko yetu = our kitchens/stoves

Here, ni works like is/are in English.

So:

• Jiko letu ni safi = Our kitchen/stove is clean

In simple present-tense sentences like this, ni links the subject with what is being said about it.

Examples:

• Nyumba ni kubwa = The house is big
• Chakula ni kizuri = The food is good

So in this sentence, ni is the word connecting jiko letu with safi.

In this sentence, safi stays safi.

That is because safi is one of many adjectives in Swahili that often do not show noun-class changes in form. It is commonly used unchanged across different nouns.

Examples:

• jiko ni safi = the kitchen/stove is clean
• nyumba ni safi = the house is clean
• vyumba ni safi = the rooms are clean

So unlike some other adjectives, safi often remains the same.

The word order is:

noun + possessive + ni + adjective

So:

• jiko = kitchen/stove
• letu = our
• ni = is
• safi = clean

Together:

Jiko letu ni safi

A key thing for English speakers is that the possessive usually comes after the noun in Swahili, not before it.

Compare:

• English: our kitchen
• Swahili: jiko letu

Yes. Jiko can refer to a kitchen or a cooking stove/hearth, depending on context.

In many real-life situations, context tells you which meaning is intended.

For example:

• In a house description, jiko may mean kitchen
• In a cooking context, it may mean stove or cooking place

So if you were shown the meaning already, that context is what decides which English translation fits best.

The plural of jiko is majiko.

So the sentence becomes:

Majiko yetu ni safi.

Changes:

• jiko → majiko
• letu → yetu because class 6 nouns take a different agreement form
• ni stays the same
• safi stays the same

So:

• Jiko letu ni safi = Our kitchen/stove is clean
• Majiko yetu ni safi = Our kitchens/stoves are clean

You can say:

Jiko letu si safi.

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

So:

• ni safi = is clean
• si safi = is not clean

That gives:

• Jiko letu ni safi = Our kitchen/stove is clean
• Jiko letu si safi = Our kitchen/stove is not clean

A simple pronunciation guide is:

jee-koh leh-too nee sah-fee

A few helpful points:

• j sounds like the j in jam
• i is like ee in see
• e is usually like e in bed, but cleaner and shorter
• u is like oo in food
• a is like a in father

Swahili words are usually pronounced quite consistently, so once you know the vowel sounds, reading gets much easier.

Yes, it is a complete and natural sentence.

It has:

• a subject: jiko letu
• a linking word: ni
• a description: safi

So it is a normal way to say that our kitchen/stove is clean.

It is also a good example of several basic Swahili patterns at once:

• noun + possessive
• noun-class agreement
• use of ni
• a common descriptive adjective

Probably this one:

Possessives in Swahili must agree with the noun class of the noun they describe.

That is why English our can appear in different forms such as:

• letu
• yetu
• wetu
• chetu
• zetu

In this sentence, the noun is jiko, so the correct form is letu.

If you remember that Swahili possessives agree with noun class, this sentence becomes much easier to understand.