A porszívó túl hangos, ezért a gyerek a hálószobába megy.

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

So:

• A porszívó túl hangos. = The vacuum cleaner is too loud.
• Literally, it is closer to The vacuum cleaner too loud.

But in other persons, Hungarian does use van / vagyok / vagy, etc.:

• Hangos vagyok. = I am loud.
• Hangos vagy. = You are loud.
• A porszívó hangos. = The vacuum cleaner is loud.

Porszívó literally means something like dust-sucker:

• por = dust
• szívó = sucker / something that sucks

So Hungarian builds the word very logically. Even if you do not know it yet, it can be useful to see how compounds work in Hungarian.

Because a is the Hungarian definite article, meaning the.

In this sentence:

• A porszívó = the vacuum cleaner
• a gyerek = the child
• a hálószobába = into the bedroom

Hungarian uses the definite article very often, much like English uses the.

Also note:

• a is used before most consonants
• az is used before vowels

For example:

• a gyerek = the child
• az autó = the car

Here túl means too, in the sense of more than is acceptable or excessively.

So:

• túl hangos = too loud

Compare:

• nagyon hangos = very loud
• túl hangos = too loud

That is an important difference:

• very loud = just a strong description
• too loud = louder than is okay

Because hangos is an adjective meaning loud, and here it is describing the vacuum cleaner.

• A porszívó túl hangos. = The vacuum cleaner is too loud.

But hangosan is an adverb, meaning loudly.

Compare:

• A porszívó hangos. = The vacuum cleaner is loud.
• A gyerek hangosan beszél. = The child speaks loudly.

So:

• hangos = loud
• hangosan = loudly

Ezért means therefore, for this reason, or so.

In this sentence, it connects the first idea to the result:

• A porszívó túl hangos, ezért a gyerek a hálószobába megy.
• The vacuum cleaner is too loud, therefore/so the child goes into the bedroom.

It is slightly more formal or explicit than a simple English so, but in many contexts so is still the best translation.

It is related to:

• ez = this
• -ért = for

So historically it is something like for this or because of this.

Gyerek commonly means child or kid.

In everyday Hungarian, gyerek is very common and natural. It is not strange or rude. Depending on context, it can sound like:

• child in neutral English
• kid in more casual English

A somewhat more formal word is gyermek.

So:

• gyerek = everyday, common
• gyermek = more formal, sometimes more literary or official

Because -ba / -be is a case ending meaning into.

So:

• hálószoba = bedroom
• hálószobába = into the bedroom

The sentence uses motion toward the inside of a place:

• a gyerek a hálószobába megy = the child goes into the bedroom

This is different from being located inside a place:

• a hálószobában = in the bedroom

So the contrast is:

• -ba / -be = into
• -ban / -ben = in

Examples:

• A gyerek a hálószobába megy. = The child goes into the bedroom.
• A gyerek a hálószobában van. = The child is in the bedroom.

Because Hungarian uses vowel harmony.

Very roughly:

• words with mostly back vowels take endings like -ba
• words with mostly front vowels take endings like -be

Hálószoba contains back vowels, so it becomes:

• hálószobába

Other examples:

• szoba → szobába = into the room
• kert → kertbe = into the garden
• üzlet → üzletbe = into the shop

So the ending changes shape to match the vowels in the word.

That a is again the definite article the.

So:

• a hálószobába = into the bedroom

Hungarian often uses:

• article + noun + case ending

The case ending goes on the noun, not on the article.

So you get:

• a szobába = into the room
• a házban = in the house
• a gyerekkel = with the child

Hungarian word order is more flexible than English word order, and it often reflects focus or information structure rather than a fixed subject-verb-object pattern.

In a neutral sentence, it is very common for the verb to come later:

• a gyerek a hálószobába megy

This sounds natural and neutral: the child goes into the bedroom.

If you change the word order, you may change the emphasis:

• A gyerek megy a hálószobába. = stronger focus on the action of going
• A hálószobába megy a gyerek. = stronger focus on the destination

So the original sentence is a normal, natural way to say it.

Megy is the normal third person singular present tense form of menni (to go).

So:

• én megyek = I go / I am going
• te mész = you go
• ő megy = he/she goes

In your sentence:

• a gyerek ... megy = the child goes

This is simply the correct present-tense form for he/she/it.

It can mean either, depending on context.

Hungarian present tense often covers both:

• goes
• is going

So:

• A gyerek a hálószobába megy. can mean
  • The child goes into the bedroom
  • The child is going into the bedroom

The broader context tells you whether it is a habitual action or something happening now.

Because the sentence contains two linked parts:

• A porszívó túl hangos
• ezért a gyerek a hálószobába megy

The comma helps mark the boundary between the cause and the result.

In English, this is similar to writing:

• The vacuum cleaner is too loud, so the child goes into the bedroom.

So the comma is natural here and helps readability.

A few useful pronunciation points:

• sz is pronounced like English s in see
• plain s in Hungarian is pronounced like English sh
• gy is a soft sound somewhat like the d in British English duke or during, though not exactly the same
• á is a longer, more open vowel than a
• ó is a long o
• í is a long ee
• hálószoba is roughly haa-loh-so-ba
• porszívó is roughly por-see-voh
• gyerek is roughly dye-rek

You do not need a perfect English equivalent for every sound right away; the most important thing at first is noticing that Hungarian spelling is very regular.

It is fairly neutral.

The first clause simply states the problem:

• The vacuum cleaner is too loud

Then ezért introduces the consequence:

• therefore the child goes into the bedroom

There is no especially strong contrast or dramatic emphasis built into the sentence. It reads like a straightforward explanation of cause and effect.

If Hungarian wanted stronger emphasis, the word order could be changed. But as given, this is a very standard, natural sentence.