Δηλώνω όχι μόνο την απώλεια αλλά και την κλοπή.

Δηλώνω is the 1st person singular present tense of the verb δηλώνω.

So literally it means I declare / I state / I report.

In this kind of context, especially with things like loss and theft, the most natural English translation is often I report.

Because Greek usually does not need a subject pronoun when the verb ending already shows who the subject is.

• δηλώνω = I report
• δηλώνεις = you report
• δηλώνει = he/she/it reports

So Δηλώνω already includes the idea of I.

You could add εγώ for emphasis, but it is not necessary:

• Εγώ δηλώνω... = I am the one reporting...

That would sound more emphatic or contrastive.

This is the standard Greek pattern for not only ... but also ...

In your sentence:

• όχι μόνο την απώλεια
• αλλά και την κλοπή

So the structure is:

• όχι μόνο X αλλά και Y
• not only X but also Y

It is very close to English in meaning and use.

Because they are the direct objects of Δηλώνω.

You are reporting what?

• την απώλεια
• την κλοπή

So Greek uses the accusative case here.

Both nouns are also:

• feminine
• singular

That is why the article is την in both cases.

In Greek, it is very normal to repeat the definite article before each noun, especially in a balanced structure like όχι μόνο ... αλλά και ...

So Greek prefers:

• την απώλεια αλλά και την κλοπή

rather than leaving the second article out.

This sounds natural and clear.

They are not the same thing.

• απώλεια = loss

  • something was lost, missing, or no longer in your possession
  • it does not necessarily mean someone stole it

• κλοπή = theft

  • someone took it illegally
  • this clearly implies stealing

So the sentence is saying that the speaker is reporting not just a loss, but also a theft.

This kind of wording sounds especially natural in formal, administrative, insurance, or police contexts.

Yes, it is fairly formal in this context.

Greek often uses δηλώνω in official or bureaucratic situations, for example:

• reporting a theft
• declaring income
• stating something officially
• filing a report

In casual speech, depending on context, a speaker might choose another verb, but here δηλώνω fits a formal statement very well.

Greek word order is more flexible than English, but this particular expression usually stays together as:

• όχι μόνο ... αλλά και ...

So:

• Δηλώνω όχι μόνο την απώλεια αλλά και την κλοπή.

is natural and clear.

You may see other word orders in Greek, but for learners it is best to treat όχι μόνο ... αλλά και ... as a fixed pair.

Because the full correlative expression is:

• όχι μόνο ... αλλά και ...
• not only ... but also ...

If you said only αλλά, the meaning would be closer to just but, not but also.

So και is important because it adds the idea of also / too.

Their dictionary forms are:

• η απώλεια = loss
• η κλοπή = theft

Both are:

• feminine nouns
• normally learned with the nominative singular article η

In your sentence, they appear in the accusative singular:

• η απώλεια → την απώλεια
• η κλοπή → την κλοπή

A few things may stand out to an English speaker:

• Δ in Δηλώνω sounds like the th in this, not like English d
• η / ι / υ / ει / οι often sound like ee in modern Greek
• χ in όχι is a Greek sound, not an English h
• stress matters:
  • δηλώνω
  • όχι
  • μόνο
  • απώλεια
  • κλοπή

A rough pronunciation guide:

• Δηλώνω όχι μόνο την απώλεια αλλά και την κλοπή
• thi-LO-no O-hi MO-no tin a-PO-lia a-LA ke tin klo-PI

That is only approximate, but it helps with the stress.

Yes. The Greek present tense can often correspond to either:

• I declare / I report
• I am declaring / I am reporting

Which one sounds best depends on context.

In an isolated sentence like this, English usually prefers:

• I report not only the loss but also the theft.

But in a real situation, it might also mean:

• I am reporting not only the loss but also the theft.

Here, no. In this structure, αλλά και clearly means but also.

So:

• όχι μόνο την απώλεια αλλά και την κλοπή

means:

• not only the loss but also the theft

It is not an even construction here.