Η μονάδα λειτουργεί.

• Η = the
• μονάδα = unit, module, or device/unit depending on context
• λειτουργεί = works, operates, or functions

So the sentence is literally The unit works / The unit operates / The unit is functioning.

Η is the feminine singular definite article in the nominative case, meaning the.

It is used because μονάδα is a feminine singular noun, and the article must agree with it.

So:

• η μονάδα = the unit

Yes, μονάδα is feminine.

One clue is its ending: many feminine nouns in Modern Greek end in -α or -η. That does not cover every noun, but it is a very common pattern.

Here, the article also confirms it:

• η μονάδα = feminine singular

It is in the nominative singular.

That is because η μονάδα is the subject of the sentence, the thing doing the action of λειτουργεί.

So the structure is:

• η μονάδα = subject
• λειτουργεί = verb

λειτουργεί is the third-person singular present tense form of the verb λειτουργώ, which means to function, to operate, or to work.

Third-person singular is used for:

• he
• she
• it

In this sentence, it corresponds to it:

• Η μονάδα λειτουργεί. = The unit works / It works.

Greek often does not use subject pronouns when they are not needed.

The verb ending already tells you the person and number. Since λειτουργεί is third-person singular, Greek does not need to add a separate word for it.

English usually says:

• It works

Greek can simply say:

• Λειτουργεί

And when the subject is named, as here, that is enough:

• Η μονάδα λειτουργεί

A natural pronunciation is approximately:

• ee mo-NA-tha lee-tour-GHEE

A few helpful notes:

• η sounds like ee
• δ in μονάδα sounds like the th in this
• ει sounds like ee
• the stress falls on:
  • μονάδα → mo-NA-tha
  • λειτουργεί → lee-tour-GHEE

The accent mark shows which syllable is stressed.

• μονάδα → stress on νά
• λειτουργεί → stress on the final εί

Stress matters in Greek pronunciation, so the written accent is important.

Yes, in Modern Greek they are both pronounced /i/, like ee in see.

So in this sentence:

• Η = ee
• the εί in λειτουργεί also sounds ee

This is very common in Greek: several different spellings can represent the same i sound.

No. λειτουργεί can mean several closely related things, depending on context:

• works
• functions
• operates
• is operating
• is functioning

For a machine, system, device, service, or department, λειτουργεί is very common.

So Η μονάδα λειτουργεί. could be understood as:

• The unit works
• The unit is functioning
• The unit is operating

Yes. Greek word order is often more flexible than English word order.

The neutral order here is:

• Η μονάδα λειτουργεί.

But you could also hear:

• Λειτουργεί η μονάδα.

That might sound more marked or context-dependent, for example if the speaker is emphasizing the fact that the unit is working.

Still, Η μονάδα λειτουργεί is the most straightforward basic form.

Yes, depending on context.

If μονάδα refers to a technical component, device, or section of a system, natural English translations could include:

• The unit works.
• The unit is functioning.
• The unit is operational.
• The module is operating.

The best translation depends on what μονάδα refers to in the larger context.

It is grammatically a verb, but in meaning it often describes a state of functioning.

So it can feel close to English expressions like:

• is working
• is functioning
• is operational

In other words, it is not always a dramatic action; it often just tells you that something is in proper working condition.

You add δεν before the verb:

• Η μονάδα δεν λειτουργεί. = The unit is not working.

This is a very common pattern in Greek:

• λειτουργεί = works
• δεν λειτουργεί = does not work / is not functioning

In Modern Greek, you usually make it a question mainly through intonation, not by changing the word order.

So you can say:

• Η μονάδα λειτουργεί; = Is the unit working?

In speech, your voice rises like in English yes/no questions. The wording itself may stay the same.