Az eredeti útvonal hosszú.

Az is the Hungarian definite article, equivalent to the.

Hungarian has two forms of the definite article:

• a before a consonant sound
• az before a vowel sound

Since eredeti begins with a vowel, Hungarian uses az:

• az eredeti útvonal = the original route

So this is not a change in meaning, just a pronunciation-based choice.

In Hungarian, the verb to be is usually omitted in the present tense when the subject is third person singular or plural.

So instead of saying something literally like The original route is long, Hungarian simply says:

• Az eredeti útvonal hosszú.

This is completely normal Hungarian grammar.

If the sentence were in the past or future, or with first/second person, forms of van / lenni would appear more clearly.

For example:

• Az útvonal hosszú volt. = The route was long.
• Hosszú vagyok. = I am tall/long (depending on context; grammatically showing vagyok, am)

• eredeti = original
• hosszú = long
• útvonal = route / itinerary / path

In this sentence:

• eredeti describes the noun útvonal
• hosszú is the main statement about the route

So the structure is roughly:

• Az eredeti útvonal = the original route
• hosszú = is long

Because the two adjectives are doing different jobs.

• eredeti is an attributive adjective: it directly modifies the noun, so it comes before the noun.
  • az eredeti útvonal = the original route
• hosszú is a predicate adjective: it tells us something about the subject.
  • Az eredeti útvonal hosszú. = The original route is long.

So Hungarian works similarly to English here:

• the original route
• the route is long

The subject is Az eredeti útvonal.

That whole noun phrase means the original route.

Then hosszú tells us something about that subject.

So the sentence breaks down like this:

• Az eredeti útvonal = subject
• hosszú = predicate adjective

No. Hungarian does not have grammatical gender like many Indo-European languages do.

That means:

• nouns are not masculine, feminine, or neuter
• adjectives do not change for gender

So eredeti and hosszú stay the same regardless of whether you are talking about something that would be he, she, or it in English.

This is often good news for English speakers: there is no need to memorize gender agreement.

Usually not in the same way they do in many European languages.

In this sentence:

• eredeti stays eredeti
• hosszú stays hosszú

They do not change to match the noun for gender, and attributive adjectives do not normally change for plural either.

For example:

• az eredeti útvonal = the original route
• az eredeti útvonalak = the original routes

Notice that eredeti does not change.

However, predicate adjectives can take plural marking:

• Az eredeti útvonalak hosszúak. = The original routes are long.

So agreement is limited, and it works differently from languages like Spanish, German, or French.

Útvonal means route, course, or sometimes itinerary, depending on context.

It is a single noun. It is often used for:

• travel routes
• driving routes
• planned paths
• directions or navigation routes

So in this sentence, it most naturally means route.

It is one word, and yes, it is historically a compound:

• út = road / way
• vonal = line

Together, útvonal means something like route.

Hungarian forms many nouns this way, by combining smaller words into a single compound.

A rough pronunciation guide:

• Az ≈ uz
• eredeti ≈ EH-reh-deh-tee
• útvonal ≈ OOT-voh-nawl
• hosszú ≈ HOS-soo

A few useful pronunciation points:

• Hungarian stress is usually on the first syllable of each word.
• ú is a long vowel, like a longer oo sound.
• sz is pronounced like English s
• s by itself is pronounced like English sh

So in hosszú:

• sz = s
• the word sounds roughly like HOS-soo

The accent marks in Hungarian usually show vowel length, not word stress.

So:

• u and ú are different vowels in length
• o and ó are different in length
• a and á are also different

In your sentence:

• útvonal has ú
• hosszú has ú

That means those vowels are held longer than a short u.

This matters because vowel length can change the word or make pronunciation sound unnatural if ignored.

Yes, Hungarian word order is flexible, but the basic neutral order here is very natural:

• Az eredeti útvonal hosszú.

This presents the original route as the topic, and then says something about it: it is long.

Other word orders are possible, but they usually add emphasis or contrast.

For example:

• Hosszú az eredeti útvonal.

This can sound more like The original route is long with emphasis on long.

So the version you have is the most neutral, straightforward form.

No. Hosszú can be used in several related ways, much like English long.

It can describe:

• physical length: a long road
• duration: a long time
• extended size in one dimension

In this sentence, since útvonal means route, hosszú clearly means long in the physical/distance sense.

Yes, depending on context, eredeti can mean:

• original
• authentic
• genuine

But with útvonal, the most natural meaning is original:

• the original route

So here it likely means the route that was first planned or first used, not a changed or alternate one.

Here útvonal is in the basic dictionary form, often called the nominative.

Hungarian uses many case endings, but the subject of a sentence often has no ending.

So:

• útvonal = route / the route depending on context and article

In this sentence it is the subject, so no extra case ending is needed.

It would be:

• Az eredeti útvonalak hosszúak.

Breakdown:

• útvonalak = routes
• hosszúak = are long / long in plural predicate form

So:

• Az eredeti útvonal hosszú. = The original route is long.
• Az eredeti útvonalak hosszúak. = The original routes are long.

This is a useful example because it shows that the predicate adjective becomes plural: hosszúak.

Yes. It is a simple, natural, grammatically correct Hungarian sentence.

It is a good example of several basic patterns:

• definite article: az
• adjective before noun: eredeti útvonal
• no present-tense is
• predicate adjective at the end: hosszú

So it is a very useful beginner sentence for understanding basic Hungarian sentence structure.