Πριν από δύο ώρες σου έστειλα μήνυμα.

πριν από means before / ago in time expressions.

In this sentence, Πριν από δύο ώρες means two hours ago.

Greek often uses:

• πριν από + time expression = ago
• for example:
  • πριν από μία μέρα = a day ago
  • πριν από ένα μήνα = a month ago

You may also hear just πριν δύο ώρες in some contexts, especially in speech, but πριν από δύο ώρες is a very standard and clear form.

ώρες is the accusative plural of η ώρα (hour).

After πριν από, Greek uses the accusative:

• πριν από δύο ώρες
• πριν από τρεις μέρες
• πριν από ένα λεπτό

In this particular phrase, δύο does not change form, so the main visible clue is ώρες, which is the accusative plural form.

σου means to you.

It is the weak form (clitic pronoun) of the 2nd person singular indirect object:

• μου = to me
• σου = to you
• του / της = to him / her
• μας = to us
• σας = to you (plural or polite)
• τους = to them

So:

• σου έστειλα μήνυμα = I sent you a message

In Greek, weak object pronouns like μου, σου, του, της usually come before the finite verb.

So:

• σου έστειλα μήνυμα = I sent you a message
• μου είπε = he told me
• της αγόρασα ένα βιβλίο = I bought her a book

This is one of the most basic word-order patterns in Greek.

έστειλα is the aorist form of στέλνω (to send).

The Greek aorist usually expresses a completed action:

• στέλνω = I send / I am sending
• έστειλα = I sent

So σου έστειλα μήνυμα focuses on the fact that the sending happened as a single completed event.

That έ- is the augment, which often appears in past tense forms in Greek, especially when the stress pattern allows it.

For example:

• στέλνω → έστειλα
• γράφω → έγραψα
• δίνω → έδωσα

It is a common feature of many past-tense forms, especially the aorist and imperfect.

Because έστειλα and έστελνα express different aspects.

• έστειλα = I sent
  A completed action, seen as one whole event.
• έστελνα = I was sending / I used to send
  Ongoing, repeated, or background action.

In this sentence, the speaker means a completed action: I sent you a message two hours ago, so έστειλα is the natural choice.

Greek does not always need an article where English does.

Here, μήνυμα means a message, even without an explicit word for a/an, because Greek has no indefinite article.

So:

• σου έστειλα μήνυμα = I sent you a message
• αγόρασα βιβλίο = I bought a book

If you want to be more specific, Greek often uses the definite article:

• σου έστειλα το μήνυμα = I sent you the message

So the absence of the article here gives the more general meaning a message.

μήνυμα is in the accusative singular, because it is the direct object of έστειλα.

The dictionary form is:

• το μήνυμα = the message

For this neuter noun, the nominative and accusative singular are the same in form:

• nominative: το μήνυμα
• accusative: το μήνυμα

Without the article, you just see μήνυμα.

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

The neutral sentence here is:

• Πριν από δύο ώρες σου έστειλα μήνυμα.

But you could also hear:

• Σου έστειλα μήνυμα πριν από δύο ώρες.
• Μήνυμα σου έστειλα πριν από δύο ώρες.
  This sounds more marked or emphatic.

The original order is very natural and starts with the time phrase for context: Two hours ago...

Usually, yes, in everyday modern Greek μήνυμα often means message, and very commonly text message depending on context.

But it can also mean a message in a broader sense:

• a written message
• a phone message
• a general message someone sends

If the context is phones/chatting, most learners should understand it as text message.

You would change σου to σας.

• Πριν από δύο ώρες σου έστειλα μήνυμα. = I sent you (singular/informal) a message two hours ago.
• Πριν από δύο ώρες σας έστειλα μήνυμα. = I sent you (plural or formal singular) a message two hours ago.

Everything else stays the same.

A rough pronunciation is:

PRIN a-PO THEE-o O-res soo E-stee-la MEE-nee-ma

A few notes:

• δύο sounds roughly like THEE-o
• ώρες sounds roughly like O-res
• σου sounds like soo
• έστειλα sounds roughly like E-stee-la
• μήνυμα sounds roughly like MEE-nee-ma

The written accent marks show which syllable is stressed:

• από
• δύο
• ώρες
• έστειλα
• μήνυμα

More or less, yes:

• Πριν από = before / ago
• δύο ώρες = two hours
• σου = to you
• έστειλα = I sent
• μήνυμα = message

But the natural English translation is:

• I sent you a message two hours ago.

So the Greek structure is close, but πριν από δύο ώρες is best translated idiomatically as two hours ago, not literally as before two hours.