Πάω κατευθείαν σε εκείνη την έξοδο, γιατί η κεντρική είσοδος είναι γεμάτη κόσμο.

In Greek, subject pronouns are often omitted because the verb ending already shows the person.

• πάω = I go / I’m going
• So Εγώ πάω is usually unnecessary unless you want emphasis or contrast.

For example:

• Πάω κατευθείαν... = I’m going straight...
• Εγώ πάω κατευθείαν, όχι εσύ. = I’m going straight there, not you.

So in this sentence, leaving out εγώ sounds natural.

It can mean either, depending on context.

In everyday Modern Greek, πάω often works like:

• I go
• I’m going
• sometimes even I am on my way

In this sentence, the most natural sense is probably I’m going or I’m heading:

• Πάω κατευθείαν σε εκείνη την έξοδο
  = I’m going straight to that exit

Greek uses the present tense in many situations where English may prefer either simple present or present continuous.

κατευθείαν means straight, directly, or right away, depending on context.

Here it means directly / straight in the sense of movement:

• Πάω κατευθείαν... = I’m going straight / directly...

It is an adverb, so it describes how the action is done.

Other examples:

• Πήγα κατευθείαν σπίτι. = I went straight home.
• Έλα κατευθείαν εδώ. = Come straight here.
• Μόλις τελειώσω, φεύγω κατευθείαν. = As soon as I finish, I’m leaving right away.

Because σε is the preposition commonly used to show destination: to, into, toward.

So:

• πάω σε... = go to...

In this sentence:

• σε εκείνη την έξοδο = to that exit

This is very common in Greek:

• Πάω στο σπίτι. = I’m going home / to the house.
• Πηγαίνω στην πόλη. = I’m going to the city.

Notice that σε + article often contracts:

• σε το → στο
• σε την → often written στη(ν)

But here there is a demonstrative before the noun, so it stays separate:

• σε εκείνη την έξοδο

In Greek, demonstratives like αυτός, αυτή, αυτό and εκείνος, εκείνη, εκείνο are normally used together with the definite article.

So Greek says:

• εκείνη την έξοδο = that exit
• literally something like that the exit

This is normal Greek structure, not extra emphasis.

Compare:

• αυτό το βιβλίο = this book
• εκείνο το σπίτι = that house
• εκείνη την έξοδο = that exit

So the article την is required here.

Because the phrase is in the accusative singular feminine.

Let’s break it down:

• έξοδος = exit (dictionary form, nominative singular)
• After σε, the noun goes in the accusative
• Feminine accusative singular of η έξοδος is την έξοδο

The demonstrative must agree with the noun:

• εκείνη = feminine accusative singular here
• την = feminine accusative singular article
• έξοδο = feminine accusative singular noun

So:

• εκείνη την έξοδο = that exit

A quick pattern:

• η έξοδος = the exit
• την έξοδο = the exit (as object / destination)

Both can mean that/this, but they differ in distance and feel.

• αυτή usually means this or sometimes that when it is relatively near or just mentioned
• εκείνη means that one over there, usually farther away or more clearly separate

So:

• αυτή την έξοδο = this exit / this one here
• εκείνη την έξοδο = that exit / that one over there

In your sentence, εκείνη suggests a specific exit farther away from the speaker or the one being pointed out at some distance.

Yes, γιατί can mean both why? and because.

The meaning depends on sentence type and punctuation.

• Γιατί φεύγεις; = Why are you leaving?
• Φεύγω γιατί είμαι κουρασμένος. = I’m leaving because I’m tired.

In your sentence, it introduces a reason:

• ..., γιατί η κεντρική είσοδος είναι γεμάτη κόσμο.
• ..., because the main entrance is full of people.

So here it is clearly because, not why.

Because this phrase is the subject of the second clause, so it is in the nominative.

Breakdown:

• η = the (feminine nominative singular)
• κεντρική = central / main (feminine nominative singular)
• είσοδος = entrance (feminine nominative singular)

So:

• η κεντρική είσοδος = the main entrance

The adjective must agree with the noun in gender, number, and case.

Compare:

• η κεντρική είσοδος = nominative, subject
• την κεντρική είσοδο = accusative, object/destination

They are opposites:

• είσοδος = entrance
• έξοδος = exit

You can see they are related in form:

• είσ- suggests entering
• έξ- suggests going out

So the sentence contrasts them nicely:

• εκείνη την έξοδο = that exit
• η κεντρική είσοδος = the main entrance

This is a common pair in signs and public places.

γεμάτη is an adjective meaning full, and it agrees with η κεντρική είσοδος.

Since είσοδος is feminine singular, the adjective is also feminine singular:

• masculine: γεμάτος
• feminine: γεμάτη
• neuter: γεμάτο

So:

• η είσοδος είναι γεμάτη = the entrance is full

Then κόσμο tells you what it is full of:

• γεμάτη κόσμο = full of people / crowded

Because after γεμάτη, Greek commonly uses κόσμο here to mean people / crowd.

• κόσμος is the dictionary form
• κόσμο is the accusative singular

In everyday Greek, κόσμος very often means:

• people
• crowd

So:

• γεμάτη κόσμο = full of people
• more naturally in English: crowded

This is a very common expression.

Both are possible.

You may hear:

• γεμάτη κόσμο
• γεμάτη από κόσμο

Both mean full of people.

The version without από is very common and natural in everyday Greek, especially with words like κόσμο.

So your sentence:

• η κεντρική είσοδος είναι γεμάτη κόσμο

is perfectly normal and idiomatic.

Here it means people.

The noun κόσμος can mean different things depending on context:

• world
• people
• crowd

In this sentence, since we are talking about an entrance being full, the meaning is clearly:

• people
• or more idiomatically, a crowd

So:

• γεμάτη κόσμο = full of people / crowded

Because γιατί introduces a subordinate clause giving the reason.

The two parts are:

1. Πάω κατευθείαν σε εκείνη την έξοδο
2. γιατί η κεντρική είσοδος είναι γεμάτη κόσμο

The comma helps separate the main statement from the explanation:

• I’m going straight to that exit, because the main entrance is crowded.

In Greek, commas are commonly used before clauses introduced by words like γιατί when they add explanatory information like this.

Yes. Πάω and πηγαίνω are closely related, and in many contexts both can mean I go / I’m going.

• Πάω is very common in everyday speech
• πηγαίνω can sound slightly more neutral or formal, depending on context

So these are both possible:

• Πάω κατευθείαν σε εκείνη την έξοδο.
• Πηγαίνω κατευθείαν σε εκείνη την έξοδο.

In normal spoken Greek, πάω is extremely common and natural.

Yes. With destinations, πάω normally takes σε.

• πάω σε μια έξοδο = go to an exit
• πάω στο σπίτι = go home / to the house

Using για would usually change the meaning. για often means for, toward, or shows purpose rather than a simple destination.

So for a direct target place, σε is the normal choice here:

• Πάω σε εκείνη την έξοδο = correct and natural

Yes, absolutely.

Greek often says:

• είναι γεμάτη κόσμο
  literally: is full of people

But natural English may prefer:

• is crowded

So both of these are good translations of the Greek idea:

• the main entrance is full of people
• the main entrance is crowded

This is a good example of how natural translation is not always word-for-word.