A táv nagyon hosszú.

In Hungarian, the verb to be is usually left out in the present tense when the subject is third person and the predicate is a noun or adjective.

So:

• A táv nagyon hosszú. = The distance is very long.

But in other persons, Hungarian does use the verb:

• Én fáradt vagyok. = I am tired.
• Te fáradt vagy. = You are tired.

So for he/she/it or this/that in the present tense, Hungarian often just says the subject + adjective.

A is the Hungarian definite article, meaning the.

So:

• a táv = the distance

Hungarian has two forms of the definite article:

• a
• az

Which one is used depends on the following sound, similar to a/an in English:

• a táv
• az út

Here it is a because táv begins with a consonant.

Táv means distance, range, or length of a route/course, depending on context.

In a sentence like A táv nagyon hosszú, it most naturally means something like:

• the distance
• the route
• the race distance
• the stretch to be covered

It is a bit less neutral and broad than távolság, which is another common word for distance.

For example:

• távolság = distance in a general sense
• táv = often the distance to cover, a route length, race distance, or practical span

They are related, but not always interchangeable.

• távolság is the more general word for distance
• táv is often used for a distance to be covered, a course length, or a more practical/compact way of saying distance

So:

• A távolság nagy. = The distance is great.
• A táv hosszú. = The distance/course is long.

In many situations, táv sounds shorter, more direct, and very natural in contexts like sports, travel, or routes.

Because nagyon means very, and in Hungarian it normally comes before the adjective it modifies.

So:

• nagyon hosszú = very long
• nagyon jó = very good
• nagyon nehéz = very difficult

This is similar to English word order:

• very long
• not long very

A simple English-friendly guide:

• táv ≈ taav
• hosszú ≈ hoss-oo

A bit more precisely:

• á is a long vowel, somewhat like the vowel in father, but longer
• ú is a long u, like a long oo
• sz is pronounced like English s
• a single s in Hungarian is pronounced like English sh

In hosszú, the spelling contains ssz, which results in a long s sound, so it sounds roughly like hoss-oo, not hosh-oo.

In Hungarian, accent marks usually show that a vowel is longer, and sometimes also slightly different in quality.

Here:

• á is the long version of a
• ú is the long version of u

So:

• tav and táv would not sound the same
• hosszu and hosszú would not sound the same

Vowel length is important in Hungarian and can change meaning, so the accents are not optional.

Hungarian often places the most important descriptive information later in the sentence, and a structure like this is completely normal:

• A táv nagyon hosszú.

Literally, it is:

• the distance very long

That is standard Hungarian word order for a sentence with a subject and an adjective predicate.

You could change word order for emphasis in some contexts, but the given sentence is the neutral, natural version.

Yes, but that would create a different structure.

• A táv nagyon hosszú. = The distance is very long.
• A hosszú táv... = The long distance... or sometimes the long term...

So if you move hosszú before táv, it becomes an attribute modifying the noun directly:

• hosszú táv = long distance / long term

That is not the same as saying the distance is long.

It is neutral and completely natural.

• A táv is normal Hungarian
• nagyon hosszú is straightforward and common
• the whole sentence sounds like standard everyday Hungarian

It could be used in many situations, such as:

• talking about a race
• talking about a walking route
• talking about a journey
• commenting on how much distance remains

Yes.

• A táv hosszú. = The distance is long.
• A táv nagyon hosszú. = The distance is very long.

So nagyon simply strengthens the statement.

You can think of it as:

• hosszú = long
• nagyon hosszú = very long