A dekoráció piros és szép.

In Hungarian, the verb van (to be) is usually left out in the present tense, third person singular and plural when the predicate is a noun or adjective.

So:

• A dekoráció piros és szép. = The decoration is red and beautiful.

Hungarian does not normally say A dekoráció van piros és szép here.

But the verb does appear in other cases, for example:

• A dekoráció piros volt. = The decoration was red.
• A dekoráció piros lesz. = The decoration will be red.
• Én fáradt vagyok. = I am tired.

So this missing is is a very normal Hungarian pattern.

A is the definite article, meaning the.

So:

• a dekoráció = the decoration

Hungarian has two forms of the:

• a before a consonant sound
• az before a vowel sound

For example:

• a dekoráció = the decoration
• az alma = the apple

Since dekoráció begins with d, Hungarian uses a.

Because in this sentence they are part of the predicate, not directly attached to the noun inside a noun phrase.

Compare:

• A dekoráció piros és szép. = The decoration is red and beautiful.
• A piros és szép dekoráció = The red and beautiful decoration

So:

• after the noun → they are saying what the decoration is like
• before the noun → they are directly describing the noun as part of the noun phrase

This is a very important distinction in Hungarian.

No. Hungarian adjectives do not agree with the noun in gender, and Hungarian has no grammatical gender like he/she noun classes in some languages.

So piros stays piros, and szép stays szép.

Examples:

• A dekoráció piros.
• A ház piros. = The house is red.
• A virág piros. = The flower is red.

The adjective does not change depending on the noun.

This is the most neutral, natural order for a simple statement.

• piros és szép = red and beautiful

Hungarian word order is flexible, but it often reflects focus or emphasis. The version you have is a straightforward neutral sentence.

You could change the order to emphasize something slightly differently:

• A dekoráció szép és piros.

This is still grammatical, but it may sound like beautiful is being mentioned first because it is more important in the speaker’s mind.

Yes. és means and.

So:

• piros és szép = red and beautiful

It works very much like English and for joining words, phrases, or clauses.

Examples:

• piros és kék = red and blue
• szép és érdekes = beautiful and interesting

A few useful pronunciation points:

• Hungarian stress is usually on the first syllable of the word.
• sz is pronounced like English s in see
• Hungarian s by itself is pronounced like English sh
• é is a long vowel, roughly like ay in say, but cleaner and without much glide
• á is a long vowel, somewhat like the a in father, but not exactly the same
• ó is a long o

Rough guides:

• dekoráció ≈ DE-ko-raa-tsi-ó
• piros ≈ PI-rosh
  (because final s sounds like sh)
• szép ≈ sape with a pure long é

The exact pronunciation is best learned by listening, but those points help a lot.

Because in Hungarian:

• sz = English s
• s = English sh

So:

• szép begins with an s sound, not a sh sound

This is one of the first spelling rules English speakers usually need to learn in Hungarian.

Yes, piros is a very common everyday word for red.

Hungarian also has vörös, which can also mean red, but the two are not always used in exactly the same situations.

For many everyday things, piros is the most natural basic choice:

• piros alma = red apple
• piros autó = red car

So in your sentence, piros is perfectly normal.

Yes, absolutely. That is grammatical.

Both of these work:

• A dekoráció piros és szép.
• A dekoráció szép és piros.

The difference is mainly about order of emphasis or what sounds more natural in context. In many cases, both are fine.

Dekoráció is a noun meaning decoration.

It is a singular noun here:

• A dekoráció = the decoration

It is also a good example of a Hungarian word that looks familiar to English speakers because it is an international-style word.

You would move the adjectives before the noun:

• a piros és szép dekoráció

This is different from:

• A dekoráció piros és szép. = The decoration is red and beautiful.

So compare:

• a piros dekoráció = the red decoration
• A dekoráció piros. = The decoration is red.

That before/after difference is very important in Hungarian.