Nilipofungua sufuria, mvuke wenye harufu ya karafuu ulitoka mara moja.

It can be broken down like this:

• ni- = I
• -li- = past tense
• -po- = when / at the time when
• fungua = open

So nilipofungua means when I opened.

This is a very common Swahili pattern: a lot of information that English would spread across several words gets packed into one verb form.

In this sentence, -po- marks a time relationship: when.

So:

• nilifungua = I opened
• nilipofungua = when I opened

It is not the same as a normal tense marker by itself; it helps create a clause meaning when I did X.

Because Swahili often builds when directly into the verb.

Instead of saying something like when I opened the pot with a separate word for when, Swahili can simply say nilipofungua sufuria.

You can sometimes add words like wakati for extra explicitness, but it is not necessary here. The verb form already does the job naturally.

Because the object is stated explicitly right after the verb: sufuria.

In Swahili, if the object noun is present, an object marker is often not needed.

So:

• nilipofungua sufuria = when I opened the pot
• nilipoifungua = when I opened it

In the second example, -i- is the object marker for a class 9 noun such as sufuria.

Because the subject is mvuke, and mvuke belongs to noun class 3 in the singular.

Class 3 singular nouns take the subject prefix u- on verbs.

So:

• mvuke ulitoka = the steam came out

If the noun were from a class that uses i-, then ilitoka would make sense, but not with mvuke.

It breaks down like this:

• u- = subject marker for the noun class of mvuke
• -li- = past tense
• toka = come out, go out, emerge

So ulitoka means it came out or it emerged.

In this sentence, the natural English meaning is came out.

Here -enye means having or with, and it changes form to agree with the noun class.

With mvuke (class 3 singular), the correct form is wenye.

So:

• mvuke wenye harufu ya karafuu = steam with the smell of cloves
• more naturally in English: clove-scented steam or steam with a clove smell

A useful thing to remember is that wenye is not only for people. It can also describe things, depending on noun class agreement.

Literally, it means smell of cloves.

• harufu = smell / scent
• ya = of, agreeing with harufu
• karafuu = cloves / clove

The ya is a connector that shows possession or association, similar to of in English.

So:

• harufu ya karafuu = the smell of cloves / a clove smell

Sufuria is usually treated as a class 9/10 noun.

A helpful thing about many class 9/10 nouns is that the singular and plural often look the same. So sufuria can be singular or plural depending on context, though here it is clearly singular: the pot.

In this sentence, you do not see class agreement on sufuria itself because it is just the object of kufungua.

Because that is the normal order in Swahili.

Usually, the noun comes first, and descriptive material follows it:

• noun
• adjective / descriptive phrase
• possessive or associative phrase

So:

• mvuke = steam
• wenye harufu = having a smell
• ya karafuu = of cloves

This is very natural Swahili word order, even though English might prefer something more compact like clove-scented steam.

Here mara moja means immediately, at once, or right away.

So:

• ulitoka mara moja = it came out immediately

Literally, mara moja can also suggest one time or once in some contexts, but in sentences like this it very commonly means immediately.

Yes. The verb toka often means come from, go out, exit, or emerge, depending on context.

With mvuke as the subject, the idea is that the steam came out of the pot as soon as it was opened.

So ulitoka is a very natural choice here.