Chumba cha usaili kiko ofisini.

A simple breakdown is:

• chumba = room
• cha usaili = of interview / interview
• kiko = it is located / it is there
• ofisini = in/at the office

So the structure is basically:

[room] + [of interview] + [is located] + [in the office]

Swahili often builds noun phrases more literally than English does, so what English says as interview room, Swahili says room of interview.

Swahili commonly links two nouns with a connector to show relationships like:

• possession
• type
• purpose
• association

So chumba cha usaili literally means room of interview, but natural English turns that into interview room.

This pattern is very common in Swahili:

• kitabu cha mwanafunzi = student’s book / book of the student
• meza ya chakula = dining table / table for food
• chumba cha kulala = bedroom / room for sleeping

So cha usaili is not strange or overly literal in Swahili; it is a normal way to describe what kind of room it is.

Cha is a linking word often called the associative or genitive connector. It connects chumba with usaili.

In this sentence, cha can be understood as:

• of
• for
• sometimes simply a marker showing what kind of thing something is

So chumba cha usaili means room of/for interview.

The important thing is that cha agrees with chumba, not with usaili.

Because chumba belongs to a noun class that takes cha in this construction.

In Swahili, agreement words change depending on the noun class of the main noun. Here, the head noun is chumba, so the connector must match chumba.

That is why you get:

• chumba cha usaili

If the noun were plural, the agreement would change:

• vyumba vya usaili = interview rooms

So:

• singular chumba → cha
• plural vyumba → vya

This is one of the most important features of Swahili grammar.

Because this sentence is talking about location, not simple identity.

Swahili often uses ni when one thing is being identified as another:

• Hiki ni chumba. = This is a room.

But when saying where something is located, Swahili usually uses a locative form such as kiko:

• Chumba kiko ofisini. = The room is in the office.

So:

• ni = is, in the sense of equals / is identified as
• kiko = is located / is present

That is why Chumba cha usaili ni ofisini sounds unnatural in standard usage for physical location.

Kiko includes agreement with the noun chumba.

You can think of it roughly like this:

• ki- = subject agreement for the noun class of chumba
• -ko = a locative element meaning something like there / in that place

So kiko means something like it is there or it is located, with it referring to chumba.

This is why the form changes with different nouns:

• chumba kiko = the room is
• vyumba viko = the rooms are

The beginning of the word changes to match the noun.

Ofisini means in the office or at the office.

The ending -ni is a very common locative ending in Swahili. It often marks a place as a location.

So:

• ofisi = office
• ofisini = in/at the office

This means Swahili often does not need a separate word for in before a place noun, because the location idea is already built into the noun.

Other examples:

• nyumbani = at home
• shuleni = at school
• mezani = on the table / at the table
• dukani = at the shop

It can mean either, depending on context.

Swahili locative expressions are often broader than English prepositions. So ofisini may be translated as:

• in the office
• at the office

If the exact English preposition matters, context usually tells you which one is best.

So in a sentence like this, either translation may be natural depending on the situation.

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

So chumba can mean:

• a room
• the room

And chumba cha usaili can mean:

• an interview room
• the interview room

Context tells you which meaning is intended.

This is very normal in Swahili, so learners should not expect every noun to have a separate word like the.

Chumba is a singular noun in the ki-/vi- class pair, even though its form does not begin with ki-.

Its plural is:

• vyumba = rooms

This matters because many other words in the sentence must agree with it. That is why you see:

• cha in chumba cha usaili
• ki- in kiko

So the noun class affects:

• connectors
• adjectives
• verbs
• demonstratives
• possessives

For learners, this is one of the key grammar systems to notice in Swahili.

You would need to change the agreement words to match the plural noun class.

Singular:

• Chumba cha usaili kiko ofisini.

Plural:

• Vyumba vya usaili viko ofisini.

Notice the changes:

• chumba → vyumba
• cha → vya
• kiko → viko

This is a good example of how Swahili agreement works across the whole sentence.