Hluk je velký.

Yes, velký very often means big or large, but in Czech it can also be used with nouns like hluk to mean that the noise is great/intense, which in natural English is usually loud.

So in this sentence, Hluk je velký. means something like:

• The noise is loud.
• literally, The noise is big/great.

This is a normal Czech way to express strong noise.

Hluk is a noun. It is masculine inanimate singular.

That matters because adjectives that describe it must match its gender, number, and case. That is why the adjective appears as velký.

A few useful points:

• dictionary form: hluk
• gender: masculine inanimate
• number here: singular
• case here: nominative

Je is the 3rd person singular form of the verb být (to be).

So:

• já jsem = I am
• ty jsi = you are
• on/ona/ono je = he/she/it is

In Hluk je velký, hluk is singular, so Czech uses je = is.

Because the adjective must agree with hluk.

Since hluk is:

• masculine inanimate
• singular
• nominative

the adjective also takes the masculine singular nominative form:

• velký

This is standard adjective agreement in Czech.

Compare:

• ten hluk je velký = the noise is loud
• ta místnost je velká = the room is big
• to auto je velké = the car is big

The ending changes depending on the noun.

Normally, no. In modern standard Czech, the present-tense form of to be is usually expressed, so Hluk je velký is the normal sentence.

Leaving out je would sound incomplete in ordinary standard Czech.

So unlike some other Slavic languages, Czech generally does not omit the present-tense copula in simple statements like this.

Yes, but the meaning and structure are different.

1. Hluk je velký.

This is a full sentence:

• hluk = subject
• je = is
• velký = predicate adjective

It means: The noise is loud.

2. velký hluk

This is just a noun phrase, not a full sentence by itself.

It means:

• a loud noise
• big noise
• great noise

So:

• Slyším velký hluk. = I hear a loud noise.
• Hluk je velký. = The noise is loud.

In Czech, adjectives usually come before the noun when they directly modify it, but after být they come after the verb as part of the predicate.

Yes. Czech word order is more flexible than English, because endings carry a lot of grammatical information.

The neutral, standard order here is:

• Hluk je velký.

You may also encounter other orders for emphasis, such as:

• Velký je hluk.
• Velký hluk je. (much less natural in ordinary neutral speech)

But for a learner, the safest and most natural version is definitely:

• Hluk je velký.

No. Czech has no articles like a/an or the.

So Hluk je velký can correspond to English with or without an article depending on context, though in practice it will often be understood as:

• The noise is loud.

Context tells you whether something is definite or indefinite.

A rough pronunciation guide is:

• hluk ≈ hlook
• je ≈ yeh
• velký ≈ VEL-kee

A few notes:

• h in Czech is not the same as English h; it is usually a voiced sound, often written phonetically as /ɦ/
• j is pronounced like English y in yes
• ý is a long vowel, so the last syllable of velký is longer than i would be

A rough IPA version is:

• [ɦluk jɛ vɛlkiː]

Sometimes, yes, but the meaning may shift slightly.

For example:

• Hluk je velký. = The noise is loud / intense.
• Hluk je silný. = The noise is strong/intense.
• Je tu velký hluk. = There is a lot of noise here.

A learner might wonder about words like hlasitý. That adjective usually means loud too, but it is more commonly used with things like:

• hlasitá hudba = loud music
• hlasitý hlas = a loud voice

With hluk, velký is very natural.

Here it behaves a lot like English noise as an uncountable idea.

So Hluk je velký is talking about noise in general, not necessarily one single discrete sound.

But Czech can also use hluk in contexts where English might say:

• a noise
• a loud noise
• commotion
• din

So the exact English wording depends on context, even though the Czech sentence itself is simple.