Η καταστροφή έγινε σήμερα.

Η is the feminine singular form of the definite article, so here it means the.

It agrees with καταστροφή, which is a feminine singular noun. So:

• η καταστροφή = the disaster / the destruction

A native English speaker may notice that Greek articles change form depending on gender, number, and case, unlike English the, which always stays the same.

Because καταστροφή is:

• feminine
• singular
• here in the nominative case (because it is the subject of the sentence)

The nominative singular definite article for feminine nouns is η.

For comparison:

• ο = masculine singular nominative
• η = feminine singular nominative
• το = neuter singular nominative

So Greek is matching the article to the noun.

Καταστροφή most commonly means disaster, catastrophe, or destruction, depending on context.

Possible English translations include:

• disaster
• catastrophe
• destruction

In many everyday contexts, disaster or catastrophe sounds most natural. In other contexts, especially physical damage, destruction may fit better.

So the word has a slightly broader range than just one fixed English translation.

Έγινε is the aorist form of the verb γίνομαι.

The verb γίνομαι can mean things like:

• to become
• to happen
• to take place
• to occur

In this sentence, έγινε means happened or took place.

So:

• Η καταστροφή έγινε σήμερα.
• literally: The disaster happened today.

This is a very common use of γίνομαι in Greek.

It is past tense.

More specifically, it is the aorist, which is one of the main Greek past tenses. In a sentence like this, the aorist usually presents the event as a completed whole:

• έγινε = happened, occurred, took place

So the sentence refers to something that happened today, but still in the past from the speaker’s point of view.

Because Greek does not need a dummy subject like English it in sentences such as:

• It happened today.

In Greek, if the subject is already named, that is enough:

• Η καταστροφή έγινε σήμερα.

The subject is η καταστροφή, so there is no need for an extra pronoun.

Also, Greek often leaves out subject pronouns even when they are understood from the verb form.

Yes, σήμερα could go somewhere else. Greek word order is often more flexible than English word order.

The sentence as written:

• Η καταστροφή έγινε σήμερα.

is very natural and neutral.

But you could also hear:

• Σήμερα έγινε η καταστροφή.
• Η καταστροφή σήμερα έγινε. (less neutral, more marked/emphatic)

The basic meaning stays the same, but the emphasis may change. Putting σήμερα first can highlight today more strongly.

It is in the nominative case.

That is because it is the subject of the sentence — the thing that happened.

You can tell from:

• the article η
• the noun form καταστροφή

So this is the standard subject form:

• η καταστροφή = nominative singular

A simple English-style approximation is:

ee ka-ta-stro-FEE EH-yee-neh SEE-meh-ra

A few notes:

• Η sounds like ee
• καταστροφή has the stress on the last syllable: -φή
• έγινε is stressed on the first syllable: E-
• σήμερα is stressed on σή

A more careful phonetic approximation would be something like:

ee ka-ta-stro-FEE E-yi-ne SEE-me-ra

The exact Greek sounds are a little different from English ones, but this is a useful starting point.

The accent mark in Modern Greek shows which syllable is stressed.

So:

• καταστροφή → stress on φή
• έγινε → stress on έ
• σήμερα → stress on σή

Stress matters in Greek pronunciation, so the accent marks are important and should be learned along with the word.

Yes. A very common alternative is συνέβη, from συμβαίνω (to happen).

So you could also say:

• Η καταστροφή συνέβη σήμερα.

That also means The disaster happened today.

Very roughly:

• έγινε is often broader and very common in everyday Greek
• συνέβη is a more direct happened/occurred

Both are correct, but έγινε is extremely common and natural.

Normally, if you mean the disaster, you would keep the article:

• Η καταστροφή έγινε σήμερα.

If you remove the article:

• Καταστροφή έγινε σήμερα

it sounds less neutral and more like a headline, a dramatic statement, or a special stylistic choice. Greek uses articles more often than English in many situations, so learners should generally keep the article unless they have a reason not to.

In the sentence, Η is not being used as a letter name — it is being used as the word the.

In Modern Greek, the letter η is pronounced i, even though historically it was a different vowel. So:

• as a letter, it is called ήτα
• in this sentence, Η is simply the feminine article the
• it is pronounced ee

So a learner should read it as a word, not think of it as the letter name.