Το ταξιδιωτικό έγγραφο είναι έγκυρο.

A word-for-word breakdown is:

• Το = the
• ταξιδιωτικό = travel / travel-related
• έγγραφο = document
• είναι = is
• έγκυρο = valid

So the structure is very close to English: The travel document is valid.

Το is the definite article, meaning the.

In Greek, articles are used a lot, and they must match the noun in gender, number, and case. Here:

• το = neuter singular nominative/accusative article
• έγγραφο is a neuter singular noun

So το έγγραφο means the document.

Yes. ταξιδιωτικό is an adjective meaning travel-related or for travel.

It describes έγγραφο:

• ταξιδιωτικό έγγραφο = travel document

Like adjectives in Greek generally do, it agrees with the noun it describes. Since έγγραφο is neuter singular, the adjective also appears in the neuter singular form:

• masculine: ταξιδιωτικός
• feminine: ταξιδιωτική
• neuter: ταξιδιωτικό

Because έγκυρο is an adjective describing το ταξιδιωτικό έγγραφο, and Greek adjectives must agree with the noun.

Here the noun is:

• έγγραφο = neuter singular

So the adjective must also be neuter singular:

• masculine: έγκυρος
• feminine: έγκυρη
• neuter: έγκυρο

Even though έγκυρο comes after είναι, it still agrees with the subject. This is called a predicate adjective.

είναι is the verb to be, here meaning is.

In this sentence:

• Το ταξιδιωτικό έγγραφο είναι έγκυρο
• The travel document is valid

A useful thing to know is that είναι is also the form used for he/she/it is and they are in Modern Greek.

Examples:

• Είναι έτοιμος = He is ready
• Είναι έτοιμοι = They are ready

The verb stays είναι, while the adjective changes as needed.

It is in the nominative case, because it is the subject of the sentence.

You can think of the sentence as:

• What is valid?
• The travel document

That makes το ταξιδιωτικό έγγραφο the subject, so nominative is the expected case.

In the neuter singular, the nominative and accusative often look the same, which is why learners sometimes find this hard to notice at first.

Normally, that would sound unnatural in standard Greek.

Greek usually wants the article in a sentence like this when you mean the travel document. So:

• Το ταξιδιωτικό έγγραφο είναι έγκυρο = natural

Without το, the phrase sounds incomplete or unusual unless you are speaking in a very special context, like headings, labels, or very compressed official language.

Not completely. Greek word order is more flexible than English word order, because endings and agreement give extra grammatical information.

The most neutral order here is:

• Το ταξιδιωτικό έγγραφο είναι έγκυρο

But other orders are possible for emphasis, such as:

• Έγκυρο είναι το ταξιδιωτικό έγγραφο = emphasis on valid
• Το έγγραφο είναι έγκυρο = shorter version if travel is already understood from context

That said, the original order is the most natural one for a simple statement.

A rough pronunciation is:

• To taxi-dhio-ti-KO EGH-gra-fo EE-ne EGH-kee-ro

A few notes:

• γγ in έγγραφο sounds like ngg or a soft voiced sound depending on speech style
• δ in Modern Greek sounds like the th in this
• αι in είναι sounds like e
• the stressed syllables are marked by the accent marks:
  • ταξιδιωτικό
  • έγγραφο
  • είναι
  • έγκυρο

Accent marks in Greek show which syllable is stressed.

In this sentence:

• ταξιδιωτικό
• έγγραφο
• είναι
• έγκυρο

This is important because stress matters in Greek pronunciation and sometimes also helps distinguish forms.

So the accents are not optional decoration; they are a normal part of correct spelling.

Because the two adjectives are doing different jobs.

1. ταξιδιωτικό is an adjective inside the noun phrase:

   • το ταξιδιωτικό έγγραφο
   • the travel document

2. έγκυρο is a predicate adjective, linked to the subject by είναι:

   • είναι έγκυρο
   • is valid

So the sentence structure is:

• [The travel document] [is valid]

This is very similar to English:

• travel document = adjective before noun
• is valid = adjective after is

Yes, it is a common and natural phrase, especially in official, legal, immigration, and travel contexts.

έγγραφο is a general word for document, and ταξιδιωτικό narrows it to a document used for travel. Depending on context, it could refer to things like:

• a passport
• a temporary travel document
• another officially recognized document for crossing borders

So it is a normal phrase, not an odd literal translation.

Possibly, but it means something slightly different in style and structure.

• Το ταξιδιωτικό έγγραφο = the travel document
  This is the most natural everyday phrasing.

• Το έγγραφο ταξιδίου = literally the document of travel
  This sounds more formal or specialized.

So for a learner, το ταξιδιωτικό έγγραφο is the most useful and natural pattern to remember.

Yes, absolutely. In Greek, knowing the gender of a noun is very important because articles and adjectives must agree with it.

Here you need to know:

• έγγραφο = neuter
• so you get:
  • το έγγραφο
  • το ταξιδιωτικό έγγραφο
  • το έγγραφο είναι έγκυρο

If you used the wrong gender, Greek speakers would still probably understand you, but it would sound incorrect.

Yes — it is a very good example of three core Greek patterns:

1. Article + adjective + noun

   • το ταξιδιωτικό έγγραφο

2. The verb είναι for is

   • είναι

3. Adjective agreement with the subject

   • έγκυρο matches έγγραφο

So this one sentence helps you practice:

• noun gender
• adjective agreement
• basic sentence structure
• the verb to be

That makes it a very useful model sentence.