A nagy színpad már kész.

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

So Hungarian says:

A nagy színpad már kész.
literally: The big stage already ready.

But in natural English, you translate it with is.

If you change the tense or person, the verb appears:

• A nagy színpad kész volt. = The big stage was ready.
• Kész vagyok. = I am ready.
• Készek vagytok. = You are ready.

So the missing is is completely normal here.

A / az is the Hungarian definite article, equivalent to English the.

• a is used before a word beginning with a consonant
• az is used before a word beginning with a vowel

Here the next word is nagy, which starts with n, so you get:

a nagy színpad = the big stage

Compare:

• a ház = the house
• az asztal = the table

In Hungarian, adjectives normally come before the noun they describe, just as they do in English.

So:

• nagy színpad = big stage
• kis ház = small house
• szép kert = beautiful garden

That part of the sentence is very straightforward for an English speaker.

Már usually means already or by now.

In this sentence, it shows that the stage has reached the state of being ready:

• A nagy színpad kész. = The big stage is ready.
• A nagy színpad már kész. = The big stage is already ready / The big stage is ready now.

So már adds the idea of a completed change or earlier-than-expected readiness.

Here kész is an adjective meaning ready or finished, depending on context.

With something like a stage, it often means:

• it has been completed
• it is prepared for use
• it is now ready

So kész can overlap with both English ideas:

• ready
• finished

You should learn it as a very common Hungarian adjective.

Examples:

• Kész vagyok. = I’m ready. / I’m done.
• Kész a vacsora. = Dinner is ready.
• Kész a munka. = The work is finished.

Yes, Hungarian word order is flexible, and different orders can change the focus or emphasis.

The sentence A nagy színpad már kész is a natural way to present the topic the big stage, then say something about it: it is already ready.

Other orders are possible, for example:

• Már kész a nagy színpad.
  = Already ready is the big stage / The big stage is ready already.
  This can sound a bit more like announcing the result.

• A nagy színpad kész már.
  This is less neutral and more marked in tone; it may sound conversational or emphatic depending on context.

For learners, the given sentence is a good neutral pattern: topic + már + predicate

Hungarian adjectives do not agree with nouns in gender, because Hungarian has no grammatical gender like he/she noun classes in many European languages.

Also, in simple noun phrases, adjectives usually stay unchanged:

• nagy színpad = big stage
• nagy színpadok = big stages

Notice that nagy stays nagy, even though the noun becomes plural.

Likewise, in this sentence kész is just the predicate adjective and does not change to match anything in gender.

This is often easier than in many Indo-European languages.

A few useful pronunciation points:

• sz is pronounced like English s in see
• plain s in Hungarian sounds more like English sh
• í is a long ee sound
• é is a long sound somewhat like ay in say, but pure and steady
• Hungarian stress is usually on the first syllable

So roughly:

• színpad ≈ SEEN-pawd
• kész ≈ kayss

More specifically:

• színpad starts with sz, so use an s sound, not sh
• kész has a long é, and the final sz is again an s sound

Yes, very important. In Hungarian, accent marks are not optional spelling details; they are part of the word.

They usually show vowel quality and often vowel length too.

Here:

• í in színpad
• é in kész

must be written correctly.

If you leave them off, the word may become incorrect or even turn into a different word in other cases. So it is best to treat accented vowels as separate letters you must learn exactly.

Yes, színpad is an ordinary countable noun meaning stage, and here it is in the basic dictionary form, the nominative.

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

A nagy színpad már kész.

If it were plural, you would see the plural ending:

• A nagy színpadok már készek. = The big stages are already ready.

That also shows another useful point: when the predicate adjective is plural in this kind of sentence, it often appears in plural too:

• singular: kész
• plural: készek