Όπως κι αν ανακοινωθεί η καθυστέρηση, ο λιμενικός ενημερώνει τους επιβάτες.

As a whole, όπως κι αν means however or no matter how.

So:

• Όπως κι αν ανακοινωθεί η καθυστέρηση = However the delay is announced
• more naturally in English: No matter how the delay is announced

It introduces a concessive idea: the main action still happens regardless of the manner of the announcement.

Κι is a very common shortened form of και.

In this sentence, κι αν is the normal, natural combination. It does not change the meaning:

• κι = and
• όπως κι αν is a fixed pattern meaning however / no matter how

You will often see κι before a vowel or in set expressions. A learner should get used to it, because it appears constantly in everyday Greek.

Ανακοινωθεί is the aorist subjunctive passive, 3rd person singular, of ανακοινώνω = announce.

Here is the basic idea:

• ανακοινώνω = I announce
• ανακοινώνεται = it is announced
• να ανακοινωθεί = for it to be announced / be announced

In this sentence, it means be announced.

Important point: the aorist here does not mean past time. In the subjunctive, it usually shows the action as a single whole event, not as an ongoing process.

So ανακοινωθεί here is about the event of the delay being announced, not it was announced in the past.

Because Greek does not always use να every time English speakers think of a subjunctive-like idea.

After expressions such as:

• αν
• όταν
• όπως κι αν
• ό,τι κι αν

Greek uses subjunctive forms without adding να.

So:

• να ανακοινωθεί is possible in other contexts
• but after όπως κι αν, you simply say όπως κι αν ανακοινωθεί

A good comparison is:

• αν έρθει = if he comes
• not αν να έρθει

Because η καθυστέρηση is the subject of the passive verb ανακοινωθεί.

The structure is:

• η καθυστέρηση ανακοινώνεται / ανακοινωθεί = the delay is announced / be announced

Since the verb is passive, the delay is the thing receiving the action, but grammatically it becomes the subject, so it stands in the nominative:

• η καθυστέρηση

Compare the active version:

• ανακοινώνουν την καθυστέρηση = they announce the delay

There, την καθυστέρηση would be accusative because it is the direct object.

Literally, λιμενικός is an adjective meaning something like port-related / harbor-related.

But with the article ο, it functions as a noun:

• ο λιμενικός = the port officer / coast guard officer / harbor official

This is very common in Greek: an adjective can become a noun when used with the article.

So here ο λιμενικός is not just describing someone; it means a specific kind of official.

Here the present tense expresses a general rule, routine action, or standard procedure.

So:

• ο λιμενικός ενημερώνει τους επιβάτες = the officer informs the passengers

This does not have to mean that the informing is happening right now. It can mean:

• that is what usually happens
• that is the procedure
• that is what the officer does in such a situation

Greek uses the present tense this way very often, just like English does in sentences such as The teacher explains the rules.

Τους επιβάτες is the accusative plural, because it is the direct object of ενημερώνει.

• ενημερώνει ποιον; = whom does he inform?
• τους επιβάτες = the passengers

Breakdown:

• τους = masculine plural accusative article
• επιβάτες = plural of επιβάτης

A useful thing to notice is that in the masculine plural, the noun form επιβάτες looks the same in nominative and accusative. The article helps you see the case:

• οι επιβάτες = nominative
• τους επιβάτες = accusative

The sentence has two parts:

1. Όπως κι αν ανακοινωθεί η καθυστέρηση

   • subordinate clause
   • gives the condition/concession: however the delay is announced

2. ο λιμενικός ενημερώνει τους επιβάτες

   • main clause
   • gives the main action: the officer informs the passengers

So the overall structure is:

• No matter how X happens, Y happens

This is a very common Greek pattern.

Yes. Greek word order is more flexible than English word order, because case endings and articles show grammatical roles.

For example, you could also say:

• Ο λιμενικός ενημερώνει τους επιβάτες, όπως κι αν ανακοινωθεί η καθυστέρηση.

The basic meaning stays the same.

Why is the original order used?

• Putting Όπως κι αν ανακοινωθεί η καθυστέρηση first sets the scene first.
• It emphasizes the regardless of how idea before giving the main action.

So the original version sounds very natural and slightly more focused on the concession.

Not exactly. Όπως can have several uses in Greek, for example:

• as / like
• sometimes that
• sometimes how

But in the fixed expression όπως κι αν, the meaning is specifically:

• however
• no matter how

So it is best to learn όπως κι αν as a chunk, not by translating each word separately every time. That will make sentences like this much easier to understand.