A nyitvatartás rugalmas.

A is the definite article in Hungarian, like the in English.

• a is used before consonant sounds
• az is used before vowel sounds

Since nyitvatartás starts with the consonant sound ny, the sentence uses a:

• A nyitvatartás rugalmas.

So here, A simply means the.

Nyitvatartás is a singular noun.

Even though English often says opening hours in the plural, Hungarian commonly uses the singular noun nyitvatartás to refer to the schedule or period during which a place is open.

So Hungarian says:

• A nyitvatartás rugalmas.

where English might say:

• The opening hours are flexible.

This is a very common difference between the two languages: Hungarian uses a singular noun where English prefers a plural expression.

Yes. It comes from the expression nyitva tart, which means to keep open.

You can think of it like this:

• nyitva = open
• tart = keeps / holds
• nyitva tart = keeps open
• nyitvatartás = opening hours / the state or practice of being open

So nyitvatartás is a noun made from that verbal expression. You do not usually separate it in this noun form; as a noun, it is written as one word.

In Hungarian, the verb to be is usually left out in the present tense, third person when you have a simple statement like this.

So Hungarian says:

• A nyitvatartás rugalmas.

Literally, this is something like:

• The opening-hours flexible.

But the natural English translation is:

• The opening hours are flexible.

This omission is normal in Hungarian:

• A ház nagy. = The house is big.
• A kávé forró. = The coffee is hot.

However, in other persons, van or another form of to be does appear:

• Rugalmas vagyok. = I am flexible.
• Rugalmas vagy. = You are flexible.

Because Hungarian adjectives do not agree with nouns in the same way many European languages do.

In this sentence:

• nyitvatartás = singular noun
• rugalmas = adjective

The adjective stays the same. Hungarian adjectives do not change for:

• gender
• singular/plural
• case

So rugalmas remains rugalmas.

Examples:

• A szabály rugalmas. = The rule is flexible.
• A szabályok rugalmasak. = The rules are flexible.

Notice something important in the second sentence: when the adjective is used as the predicate with a plural subject, it often takes the plural ending -k:

• singular: rugalmas
• plural predicate: rugalmasak

But in your original sentence, nyitvatartás is singular, so rugalmas is correct.

This is the most neutral, straightforward word order.

Hungarian often structures simple sentences as:

• topic + comment

Here:

• A nyitvatartás = what we are talking about
• rugalmas = what we say about it

So the sentence means roughly:

• As for the opening hours, they are flexible.

You could change the word order for emphasis, but the basic version is the most natural if you are simply stating a fact.

A rough pronunciation guide is:

nyit-va-tar-taash

A few useful points:

• ny is a single Hungarian sound, similar to the ny in Spanish señor's ñ, or the ny in British pronunciation of new for some speakers, but softer.
• stress in Hungarian is always on the first syllable
• á is a long vowel, pronounced longer than a

So the stress is here:

• NYIT-vatartás

And tartás has the long á:

• tar-tás

Not exactly.

• nyitvatartás written as one word is a noun: opening hours, opening schedule
• nyitva tartás written as two words is generally not how this noun is normally written in standard usage

The verbal expression is:

• nyitva tart = to keep open

Example:

• Az üzlet vasárnap is nyitva tart. = The shop is open even on Sunday.

But the noun is:

• Az üzlet nyitvatartása hosszú. = The shop’s opening hours are long.

So for your sentence, nyitvatartás as one word is the correct form.

Yes, that is possible, but it is a bit different in style.

• nyitvatartás is the common, compact word for opening hours
• nyitvatartási idő is more explicit and can sound a bit more formal or explanatory

Both can work depending on context, but nyitvatartás is very natural and common.

It is in the nominative case, which is the basic dictionary form of the noun.

There is no visible ending because it is the subject of the sentence:

• A nyitvatartás rugalmas.

If you changed the sentence, you might see other case endings:

• A nyitvatartásról beszélünk. = We are talking about the opening hours.
• A nyitvatartást ellenőriztem. = I checked the opening hours.

But in your original sentence, the basic form nyitvatartás is used.

Yes, it is completely natural.

It sounds like something you might see:

• in a business description
• on a website
• in a message to customers
• in an advertisement

It has a clear, practical tone. It means that the business can adjust or vary its opening times rather than following a rigid schedule.