Zvuk je velmi hlasitý.

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

So:

• zvuk = the sound / sound
• je = is
• velmi hlasitý = very loud

It works just like English is in The sound is very loud.

Other forms of být in the present tense are:

• jsem = I am
• jsi = you are
• je = he/she/it is
• jsme = we are
• jste = you are / you all are
• jsou = they are

Because hlasitý is an adjective, and in Czech adjectives must agree with the noun they describe.

Here, the noun zvuk is:

• masculine inanimate
• singular
• nominative

So the adjective also takes the matching form:

• hlasitý

Compare:

• hlasitý zvuk = a loud sound
• hlasitá hudba = loud music (hudba is feminine)
• hlasitě? No — that would be an adverb, not an adjective.

So -ý here shows the correct masculine singular nominative adjective form.

Czech does not have articles like English a/an/the.

That means zvuk can mean:

• a sound
• the sound
• sometimes just sound

The exact meaning depends on context.

So Czech learners coming from English often look for an article, but there simply isn’t one. Czech usually leaves definiteness understood from the situation.

Velmi is an adverb meaning very. It strengthens the adjective hlasitý.

So:

• hlasitý = loud
• velmi hlasitý = very loud

It works much like English very before an adjective.

You can also compare:

• trochu hlasitý = a little loud
• docela hlasitý = quite loud
• příliš hlasitý = too loud

Yes, often you can.

• velmi hlasitý = very loud
• moc hlasitý = very loud / too loud, depending on context

The difference is mostly one of style and nuance:

• velmi sounds more neutral, standard, and a bit more formal
• moc is very common in everyday speech

However, moc can sometimes feel like too in the right context, so velmi is often safer if you clearly mean just very.

A simple learner-friendly pronunciation guide would be:

• Zvuk ≈ zvook
• je ≈ yeh
• velmi ≈ VEL-mee
• hlasitý ≈ HLA-si-tee

A few useful notes:

• Czech stress is usually on the first syllable of each word:
  • ZVUK
  • JE
  • VEL-mi
  • HLA-si-tý
• ý is a long vowel, so the last syllable in hlasitý is longer than a short i would be.
• The h in Czech is clearly pronounced.

Yes, zvuk is masculine inanimate.

One clue is the typical dictionary form ending: many masculine nouns end in a consonant, and zvuk does too.

You can also tell from adjective agreement:

• ten zvuk
• hlasitý zvuk

Both ten and hlasitý show masculine singular nominative agreement.

It is specifically inanimate, not animate, because it refers to a thing, not a living being.

Yes. Czech word order is more flexible than English word order.

The basic neutral order here is:

• Zvuk je velmi hlasitý.

But other orders are possible for emphasis, for example:

• Velmi hlasitý je ten zvuk.
• Hlasitý je ten zvuk.

These sound more marked and depend on context. For learners, the safest default is the neutral order:

• subject + verb + adverb + adjective

So Zvuk je velmi hlasitý is the best standard version to learn first.

Because hlasitý is an adjective, while hlasitě is an adverb.

Here, the sentence describes the noun zvuk (sound), so you need an adjective:

• Zvuk je hlasitý. = The sound is loud.

If you used hlasitě, you would be describing how something happens, not what the sound is like. For example:

• Mluví hlasitě. = He/She speaks loudly.

So:

• hlasitý = loud
• hlasitě = loudly

It is in the nominative case.

That is because zvuk is the subject of the sentence:

• Zvuk je velmi hlasitý.

In Czech, the subject is usually in the nominative, and predicate adjectives also match it in gender, number, and case.

That is why both parts fit together:

• zvuk = nominative singular masculine inanimate
• hlasitý = nominative singular masculine inanimate

Its main meaning is loud, especially about sound, noise, music, speech, and so on.

For example:

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

It does not mean high-pitched. If you want to talk about pitch, Czech uses different words.

So in this sentence, hlasitý is about volume/intensity, not pitch.