Η επιστροφή του ναύλου θα δοθεί αύριο.

Η is the feminine singular definite article, meaning the.

So η επιστροφή means the refund / the return. Greek uses the definite article very often, especially when talking about something specific or already known from the context.

• η επιστροφή = the refund
• επιστροφή = refund / return in a more general sense

Here, the sentence is talking about a specific refund, so η is natural.

In this sentence, επιστροφή means refund.

The noun επιστροφή can mean:

• return
• coming back
• refund

Here, because it is followed by του ναύλου (of the fare), the meaning is clearly refund:

• η επιστροφή του ναύλου = the refund of the fare

Του ναύλου is in the genitive case because Greek uses the genitive for meanings like of the fare.

So:

• ο ναύλος = the fare
• του ναύλου = of the fare

This is the same basic idea as in:

• η τιμή του εισιτηρίου = the price of the ticket
• η επιστροφή του ναύλου = the refund of the fare

A native English speaker often has to get used to this, because English usually uses of or noun-noun combinations, while Greek often uses the genitive ending instead.

Ναύλος means fare, especially a transport fare.

For example:

• ferry fare
• shipping fare
• travel fare

In modern everyday Greek, depending on context, people may also use other words such as εισιτήριο when talking about a ticket, but ναύλος specifically refers to the fare/transport charge.

So:

• ο ναύλος = the fare
• του ναύλου = of the fare

Because it changes from the nominative to the genitive singular.

Ναύλος is a masculine noun. Its basic pattern is:

• ο ναύλος = nominative singular
• του ναύλου = genitive singular

This kind of change is very common in Greek. The ending shows the noun’s grammatical role.

Here it is genitive because it depends on επιστροφή:

• refund of the fare
• επιστροφή του ναύλου

Θα δοθεί means will be given.

It is a future passive form:

• θα marks the future
• δοθεί comes from the verb δίνω (to give)

So:

• δίνω = I give
• δόθηκε = it was given
• θα δοθεί = it will be given

A very important point: after θα, modern Greek uses a form that historically comes from the subjunctive, but learners usually just need to remember the whole structure as the normal way to make the future.

Because δίνω is an irregular verb.

Its forms are not built in a simple, predictable way from the present stem:

• δίνω = I give
• έδωσα = I gave
• δόθηκε = it was given
• να δοθεί = to be given
• θα δοθεί = it will be given

So δοθεί belongs to the same verb family, even though it looks quite different from δίνω. This is something you mostly learn as a set of principal forms.

The sentence is focusing on the refund, not on the person or company giving it.

Greek, like English, often uses the passive when the doer is unknown, unimportant, or obvious from context.

So:

• Η επιστροφή του ναύλου θα δοθεί αύριο. = The fare refund will be given tomorrow.

This sounds formal and impersonal, which is common in notices, customer service language, and official communication.

An active version would be something like:

• Θα δώσουμε την επιστροφή του ναύλου αύριο. = We will give the fare refund tomorrow.

But that puts the focus on we, not on the refund.

Because it agrees with the subject, which is η επιστροφή.

The subject of the sentence is:

• Η επιστροφή = the refund

That noun is:

• singular
• feminine

In the passive, the verb agrees in number with the subject, so we get a singular form:

• θα δοθεί = will be given

If the subject were plural, the verb would also be plural:

• Οι επιστροφές θα δοθούν αύριο. = The refunds will be given tomorrow.

Yes. The whole noun phrase η επιστροφή του ναύλου is the subject.

Breakdown:

• η επιστροφή = the refund
• του ναύλου = of the fare

Together:

• η επιστροφή του ναύλου = the refund of the fare

That whole phrase is what will be given tomorrow.

Αύριο means tomorrow, and here it is an adverb of time.

Greek word order is fairly flexible, so αύριο can appear in different positions depending on emphasis. Putting it at the end is very natural and neutral.

For example, all of these are possible:

• Η επιστροφή του ναύλου θα δοθεί αύριο.
• Αύριο θα δοθεί η επιστροφή του ναύλου.
• Η επιστροφή του ναύλου αύριο θα δοθεί. (less neutral, more marked)

The version you were given sounds normal and straightforward.

Yes, absolutely.

Even though the Greek structure is literally closer to The refund of the fare will be given tomorrow, a more natural English translation is often:

• The fare will be refunded tomorrow.

That is because English usually prefers a smoother verbal expression, while Greek often allows a noun like επιστροφή plus a passive verb.

So the Greek sentence is grammatically about the refund, but natural English may express the same idea as the fare will be refunded.

Yes, it sounds somewhat formal or administrative.

It is the kind of sentence you might see in:

• a company email
• a travel notice
• customer service communication
• an official statement

That formal feeling comes from things like:

• the noun επιστροφή
• the passive θα δοθεί

In more conversational Greek, someone might say the same idea differently, depending on context.

A simple pronunciation guide is:

i epistroFÍ tu NÁvlu tha doTHÍ Ávrio

A few helpful notes:

• η sounds like ee
• θ in θα and δοθεί sounds like th in think
• the stress falls on:
  • επιστροφή
  • νάυλου
  • δοθεί
  • αύριο

If you want to say it smoothly:

Η επιστροφή του ναύλου θα δοθεί αύριο.
i epistroFÍ tu NÁvlu tha doTHÍ Ávrio

Yes, that is a useful way to think about it.

Grammatically, του ναύλου is a genitive noun phrase, but functionally it tells you what kind of refund it is:

• not just any refund
• specifically the refund of the fare

So for understanding, it is fine to treat it as a phrase modifying επιστροφή:

• η επιστροφή = the refund
• του ναύλου = of the fare

Together: the fare refund / the refund of the fare