A futár, aki a küldeményt kézbesítette, ma nem dolgozik.

Here a is the definite article, meaning the.

So:

• a futár = the courier
• a küldeményt = the shipment / the package as a specific object

Hungarian has two forms of the:

• a before most consonants
• az before vowels

For example:

• a futár = the courier
• az ember = the person

Aki means who in a relative clause, referring to a person.

In this sentence:

• A futár, aki a küldeményt kézbesítette...
• The courier, who delivered the shipment...

Hungarian uses:

• aki = who (for people)
• ami = which / that (for things, ideas)
• amely = which (more formal, usually for things)

Because futár is a person, aki is the correct choice.

That part is a non-restrictive relative clause, like English who delivered the package when it adds extra information rather than identifying which courier.

So the structure is:

• A futár, aki a küldeményt kézbesítette, ma nem dolgozik.

This means something like:

• The courier, who delivered the package, is not working today.

The commas show that aki a küldeményt kézbesítette is additional information about the courier.

If you removed the commas, the meaning would shift more toward identifying which courier you mean.

The -t marks the direct object.

• küldemény = shipment, consignment, package
• küldeményt = shipment/package as the thing being delivered

In this sentence, the package is what the courier delivered, so it takes the object ending -t.

This is very common in Hungarian:

• látok egy házat = I see a house
• olvasom a könyvet = I am reading the book
• kézbesítette a küldeményt = he/she delivered the package

Because Hungarian verbs can show whether the object is definite or indefinite.

Here the object is definite:

• a küldeményt = the shipment/package

So Hungarian uses the definite conjugation:

• kézbesítette = he/she delivered it / delivered the specific thing

Compare:

• kézbesített egy küldeményt = he/she delivered a package
  (indefinite object, so kézbesített)
• kézbesítette a küldeményt = he/she delivered the package
  (definite object, so kézbesítette)

This definite vs. indefinite verb system is something English speakers often need time to get used to.

Kézbesítette can be broken down like this:

• kézbesít = deliver
• past tense marker: -tt-
• definite-conjugation ending for he/she: -e

So:

• kézbesítette = he/she delivered it / the specific thing

In this sentence, the subject is the courier, so the form means:

• the courier delivered the package

Because Hungarian usually does not need subject pronouns when the verb form already shows the person and number.

So:

• dolgozik = he/she works
• kézbesítette = he/she delivered it / the specific thing

The subject here is already expressed by a futár, so there is no need to add ő (he/she).

Hungarian often leaves pronouns out unless they are needed for emphasis or contrast.

Ma means today.

Its placement here is very natural:

• A futár ... ma nem dolgozik.
• The courier ... is not working today.

Hungarian word order is flexible, but it is not random. Word order often reflects emphasis, topic, and focus.

In this sentence:

• a futár is the topic: what the sentence is about
• ma sets the time frame
• nem dolgozik gives the main statement: is not working

You could move things around in some contexts, but this order is neutral and natural.

In Hungarian, nem is the usual word for not, and it typically comes directly before the verb.

So:

• nem dolgozik = is not working / does not work

Examples:

• nem tudom = I do not know
• nem jön = he/she is not coming
• nem dolgozik = he/she is not working

That is one of the basic negation patterns in Hungarian.

It can mean either, depending on context.

Hungarian does not have a separate present continuous form like English is working in ordinary usage. The simple present often covers both meanings.

So:

• ma nem dolgozik can naturally mean is not working today
• in another context, nem dolgozik could also mean does not work

Here, because of ma (today), the sense is clearly is not working today.

Dolgozik is the dictionary form meaning he/she works. The verb dolgozik belongs to the group often called -ik verbs, because the 3rd person singular form ends in -ik.

For a learner, the most practical thing is simply to learn:

• dolgozom / dolgozok = I work
• dolgozol = you work
• dolgozik = he/she works

The -ik is just part of the standard form of this verb in 3rd person singular.

A very literal word-for-word mapping would look something like that, but it would not be good English.

The Hungarian structure is:

• A futár = the courier
• aki a küldeményt kézbesítette = who delivered the shipment/package
• ma = today
• nem dolgozik = is not working / does not work

Natural English is:

• The courier who delivered the package is not working today.
• or, keeping the commas: The courier, who delivered the package, is not working today.

So yes, the parts correspond fairly neatly, but the English wording has to be adjusted.

Yes, Hungarian word order is flexible, but changes in order often change emphasis.

For example:

• A futár, aki a küldeményt kézbesítette, ma nem dolgozik.
  Neutral: the courier is not working today.

• Ma nem dolgozik a futár, aki a küldeményt kézbesítette.
  More emphasis on today.

• A futár, aki a küldeményt kézbesítette, nem dolgozik ma.
  Possible, but usually less neutral than the original.

So word order is not just grammar; it also carries information structure and emphasis.

Not always. Küldemény is a perfectly correct word meaning something like shipment, consignment, or mail item. It can sound a bit more official or logistical than everyday csomag.

Compare:

• csomag = package, parcel
• küldemény = shipment, consignment, mailed item

So this sentence sounds natural, but a learner should know that in everyday speech people might often say csomag instead, depending on the context.

The main clause is:

• A futár ma nem dolgozik.
• The courier is not working today.

The relative clause inserted in the middle is:

• aki a küldeményt kézbesítette
• who delivered the package

So the full sentence is built like this:

• main clause start: A futár
• inserted relative clause: aki a küldeményt kézbesítette
• main clause continues: ma nem dolgozik

This is a useful pattern to notice, because long Hungarian sentences often insert descriptive clauses in the middle like this.