Megkeverem a kártyapaklit.

The base verb is kever, which means to mix, to stir, or in the case of cards, to shuffle.

The prefix meg- often adds a sense of completion or bringing the action to a result. So:

• keverem = I mix / I am mixing
• megkeverem = I shuffle it / I will shuffle it / I mix it up properly

With cards, megkeverem is the natural choice if you mean I’ll shuffle the deck as a complete action.

Because Hungarian uses a special verb form called the definite conjugation when the object is definite.

Here the object is:

• a kártyapaklit = the deck of cards

Since it is a specific, definite thing, the verb must agree with that and use the definite form:

• keverek = I mix / I shuffle something non-specific
• keverem = I mix / I shuffle it, the specific one

So megkeverem a kártyapaklit uses the correct definite verb form.

The -t marks the accusative case, which is the case used for the direct object.

So:

• kártyapakli = deck of cards
• kártyapaklit = deck of cards as the thing being acted on

In this sentence, the deck is what gets shuffled, so it needs the accusative ending.

A / az is the Hungarian definite article, meaning the.

Which form you use depends on the next word:

• a before a consonant
• az before a vowel

Since kártyapaklit starts with k, a consonant, Hungarian uses:

• a kártyapaklit = the deck of cards

Yes. It is a compound noun:

• kártya = card
• pakli = deck / pack

So kártyapakli literally means card-deck, or more naturally, deck of cards.

Hungarian often forms compounds this way, and writing it as one word is normal.

Because Hungarian usually leaves out the subject pronoun when it is clear from the verb ending.

In megkeverem, the ending -em already tells you the subject is I.

So:

• Megkeverem a kártyapaklit. = I’ll shuffle the deck.
• Én megkeverem a kártyapaklit. = I will shuffle the deck.

Adding én is possible, but it gives extra emphasis, something like I’ll do it.

Formally, the verb is in the present tense. Hungarian often uses present tense to talk about the near future, especially when the action is understood as a complete event.

So Megkeverem a kártyapaklit can mean:

• I’m shuffling the deck
• I’ll shuffle the deck

In real use, context decides which is meant. Very often, this sentence sounds like I’ll shuffle the deck.

Yes. Hungarian word order is flexible, and changing it changes the emphasis.

The sentence:

• Megkeverem a kártyapaklit.

is a natural way to announce the action.

Other orders are possible, for example:

• A kártyapaklit megkeverem.
  This puts more attention on the deck of cards.

Hungarian word order is not random, though. It is strongly connected to topic, focus, and emphasis.

In a simple neutral statement, the verbal prefix usually stays attached:

• megkeverem

But in some sentence types, it separates, especially with focus, negation, or certain verb forms. For example:

• Nem keverem meg a kártyapaklit. = I’m not shuffling the deck.

So in your sentence, the attached form is normal because nothing is forcing the prefix to move.

A rough pronunciation guide:

• Megkeverem ≈ MEHG-keh-veh-rem
• a ≈ aw
• kártyapaklit ≈ KAAR-tyaw-pawk-leet

A few helpful points:

• e is usually like e in met
• á is a long vowel, roughly like a in father
• ty is a soft consonant, somewhat like the t in British tune for some speakers, but softer
• stress in Hungarian normally falls on the first syllable of each word:
  • MEGkeverem
  • KÁRtyapaklit

Yes. If the context already makes it clear that you are talking about cards, pakli by itself is often enough:

• Megkeverem a paklit. = I’ll shuffle the deck.

Using kártyapaklit is just more explicit. It spells out that this is a deck of cards.