Dirisha likifungwa, kiyoyozi kitafanya kazi vizuri.

It is made of several pieces:

• li- = subject marker agreeing with dirisha
• -ki- = if / when / while marker
• fung- = verb root meaning close
• -w- = passive extension
• -a = final vowel

So likifungwa literally works like if/when it is being closed or more naturally here if/when it is closed.

Because dirisha is the noun being talked about, the verb agrees with it.

Because this sentence uses the passive.

• funga = close something
• fungwa = be closed

In this sentence, the window is not doing the closing. The window is receiving the action, so Swahili uses the passive form.

Compare:

• Mtu akifunga dirisha... = If a person closes the window...
• Dirisha likifungwa... = If the window is closed...

-ki- is a very common Swahili marker that can mean:

• if
• when
• sometimes while

The exact meaning comes from context.

So dirisha likifungwa can be understood as:

• if the window is closed
• when the window is closed

In this sentence, English would usually choose if or when, depending on the situation.

This is because of noun classes.

In Swahili, nouns belong to different classes, and verbs must agree with the class of the noun.

• dirisha is in class 5, so it takes li-
• kiyoyozi is in class 7, so it takes ki-

That is why you get:

• dirisha li-kifungwa
• kiyoyozi ki-tafanya

This agreement system is one of the most important parts of Swahili grammar.

It is built into the verb.

In English, you say it is closed or it will work.
In Swahili, the subject marker inside the verb often does the job of it.

So:

• li- in likifungwa = it referring to dirisha
• ki- in kitafanya = it referring to kiyoyozi

Swahili often does not need a separate word for it the way English does.

It breaks down like this:

• ki- = subject marker for kiyoyozi
• -ta- = future tense marker
• fanya = do / make

So kitafanya literally means it will do / it will make.

But here it is followed by kazi, giving the expression kufanya kazi, which means to work / to function.

So kitafanya kazi vizuri means it will work well or it will function well.

Because fanya kazi is a normal Swahili expression meaning:

• to work
• to function
• to operate

Literally, fanya means do and kazi means work, but together they often mean simply work in the sense of functioning.

So:

• Kiyoyozi kinafanya kazi = The air conditioner is working
• Kiyoyozi kitafanya kazi vizuri = The air conditioner will work well

It can mean either one. Swahili usually does not have separate words for a and the.

So dirisha can be:

• a window
• the window

Context tells you which one is meant. In a sentence like this, English often uses the window because it sounds like a specific window already known to the speaker and listener.

These are different verb forms:

• likifungwa = if/when it is closed
• limefungwa = it has been closed / it is closed already
• linafungwa = it is being closed

So:

• Dirisha likifungwa... gives a condition or situation
• Dirisha limefungwa states a resulting state
• Dirisha linafungwa describes an ongoing action

This is a useful contrast to learn, because the forms look similar but do different jobs.

Yes, but the original order is very natural.

Putting Dirisha likifungwa first is a clear way to present the condition before the result:

• Dirisha likifungwa, kiyoyozi kitafanya kazi vizuri.

That is similar to English If the window is closed, the air conditioner will work well.

Other orders are possible, but the given version is straightforward and common for this kind of conditional sentence.