A csapattárs kész.

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

So instead of saying The teammate is ready with a separate word for is, Hungarian simply says:

A csapattárs kész.

But in other persons, the verb does appear:

• Kész vagyok. = I am ready.
• Kész vagy. = You are ready.
• A csapattárs kész. = The teammate is ready.

So this is a very normal Hungarian sentence pattern.

A is the definite article, meaning the.

Hungarian has two forms of the definite article:

• a before consonant sounds
• az before vowel sounds

Since csapattárs begins with a consonant sound, the correct form is a:

• a csapattárs
• but az ember

Csapattárs means teammate or team member in the sense of someone who is on the same team as you.

It is a compound word:

• csapat = team
• társ = companion, partner, associate

So csapattárs literally means something like team-companion.

Kész most often means ready, finished, or done, depending on context.

With a person, it often means:

• ready
• finished
• sometimes all set

So A csapattárs kész could mean that the teammate is ready, or that the teammate has finished something, depending on the situation.

Hungarian adjectives used as predicates do not agree with the subject in the way they often do in some other languages.

So:

• A csapattárs kész.
• A csapattársak készek.

In the singular, kész stays just kész.
In the plural, Hungarian often uses the plural predicate form készek.

There is no gender agreement, because Hungarian does not have grammatical gender like he/she agreement in adjectives.

A rough pronunciation guide:

• cs sounds like ch in church
• sz sounds like s in see
• s by itself would sound like sh
• á is a long vowel, roughly like the a in father, but longer

So approximately:

• csapattárs ≈ chaw-pawt-taarsh
• kész ≈ kayss (with a long é sound)

Also, Hungarian stress is usually on the first syllable of each word:

• CSA-pattárs
• KÉSZ

Yes, Hungarian word order is flexible, but changing it often changes the focus or emphasis.

The neutral sentence is:

• A csapattárs kész.

If you change the order, you may highlight something:

• Kész a csapattárs.

That version can sound more marked, as if you are especially emphasizing ready or reacting to a situation. The basic learner-friendly form is A csapattárs kész.

It is basically neutral and natural Hungarian.

Whether it sounds formal or informal depends more on the situation than on the grammar itself. The words are standard and ordinary. If you are simply stating that a teammate is ready, this sentence is perfectly normal.

Not always. It is grammatical, but the exact naturalness depends on context.

For a person, kész can mean:

• ready
• finished
• done

In some contexts, Hungarian speakers might prefer a more specific expression, such as:

• A csapattárs készen áll. = The teammate is ready / standing by.
• A csapattárs elkészült. = The teammate has finished.

But A csapattárs kész is still understandable and can be perfectly fine in the right context.

The plural would be:

A csapattársak készek.

Breakdown:

• a = the
• csapattársak = teammates
• készek = ready / finished

Here both the noun and the predicate adjective are plural:

• csapattárs → csapattársak
• kész → készek