Η πραγματογνωμοσύνη αρχίζει αύριο.

Η is the definite article meaning the.

Here it is:

• feminine
• singular
• nominative

It matches πραγματογνωμοσύνη, which is a feminine singular noun and the subject of the sentence.

It is written as Η instead of η only because it is at the beginning of the sentence and therefore capitalized.

In this sentence, πραγματογνωμοσύνη is the subject — the thing that begins.

A few clues:

• It comes with the nominative article η
• The verb αρχίζει is third person singular, so it matches a singular subject
• The overall structure is a very normal Greek sentence pattern: subject + verb + time word

So the sentence is built like:

• Η πραγματογνωμοσύνη = the subject
• αρχίζει = begins / starts
• αύριο = tomorrow

Yes — and that is often a good way to remember long Greek words.

A rough breakdown is:

• πραγματο- related to πράγμα = matter, thing, fact
• γνωμο- related to judgment, opinion, expert assessment
• -σύνη = a noun-forming ending that creates an abstract idea or state

So the word is built like a formal, technical noun meaning something like an expert judgment concerning the facts or matter.

Even if you already know the meaning, noticing the parts can help you recognize similar formal Greek compounds later.

A helpful approximation is:

prahgh-mah-toh-ghnoh-moh-SEE-nee

The stress is on -σύ-.

More precisely in modern Greek pronunciation, it is roughly:

/praɣmatoɣnomoˈsini/

A few pronunciation notes:

• γ here is not like English g in go
• before back vowels, it sounds more like a soft throaty sound, often written gh
• γν is pronounced with both sounds, roughly ghn
• η sounds like ee

Αρχίζει is the 3rd person singular present tense of αρχίζω = to begin / to start.

So:

• αρχίζω = I begin / I start
• αρχίζει = he/she/it begins, or in this case it begins

It agrees with the singular subject η πραγματογνωμοσύνη.

Because Greek often uses the present tense for a scheduled or certain future event, especially when a time word makes the future meaning clear.

Here, αύριο already tells you the event is in the future, so αρχίζει can naturally mean:

• starts tomorrow
• begins tomorrow

English does something similar:

• The exam starts tomorrow
• The meeting begins at 9

So this Greek usage is very normal.

Yes, absolutely.

Both are possible, but they feel slightly different:

• Η πραγματογνωμοσύνη αρχίζει αύριο
  Often sounds like a scheduled or officially set event.

• Η πραγματογνωμοσύνη θα αρχίσει αύριο
  More explicitly marks the future with θα.

In many real situations, both would be understood perfectly well. The version without θα is especially common when the future time is already obvious from a word like αύριο.

Yes, Greek word order is more flexible than English.

This sentence has a very neutral order:

• Η πραγματογνωμοσύνη αρχίζει αύριο.

But you could also say:

• Αύριο αρχίζει η πραγματογνωμοσύνη.

That version puts more emphasis on tomorrow.

So the end position here is simply a natural, unmarked place for a time expression.

Yes, they do.

Greek accent marks show which syllable is stressed, and sometimes they also help distinguish different words.

For example:

• η = the
• ή = or

So in this sentence, the first word is Η without an accent because it is the article the, not or.

Other stress points:

• αρχίζει → stress on -χί-
• αύριο → stress on the first syllable
• πραγματογνωμοσύνη → stress on -σύ-

Paying attention to the accents will help both your pronunciation and your reading.