Ο λιμενικός ελέγχει την ανακοίνωση επιβίβασης.

The coast guard officer checks the boarding announcement.

Breakdown of Ο λιμενικός ελέγχει την ανακοίνωση επιβίβασης.

• ελέγχω: to check
• η ανακοίνωση επιβίβασης: the boarding announcement
• ο λιμενικός: the coast guard officer

Questions & Answers about Ο λιμενικός ελέγχει την ανακοίνωση επιβίβασης.

Why does the sentence use Ο before λιμενικός and την before ανακοίνωση?

These are definite articles, meaning the.

• ο = masculine singular nominative
• την = feminine singular accusative

They agree with the nouns they go with:

• ο λιμενικός = the subject
• την ανακοίνωση = the direct object

So the articles help show who is doing the action and what is being acted on.

Is λιμενικός an adjective or a noun here?

Here it is being used as a noun.

Originally, λιμενικός is adjective-like in form, related to the port / harbor. But in everyday Greek, ο λιμενικός commonly means the port officer / coast guard officer / harbor police officer, depending on context.

So in this sentence, it functions as a person noun, not just as an adjective describing something else.

What exactly is ελέγχει grammatically?