Az úszásoktató segít.

Hungarian has two forms of the definite article:

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

Since úszásoktató begins with ú, which is a vowel, the correct form is az úszásoktató.

Compare:

• a tanár = the teacher
• az oktató = the instructor

It is a compound noun:

• úszás = swimming
• oktató = instructor / teacher

So úszásoktató literally means swimming instructor.

Hungarian very often builds longer nouns by combining smaller words into one compound.

Because Hungarian normally writes compound nouns as a single word.

So instead of writing something like swimming instructor as two separate words, Hungarian combines the parts:

• úszás
  • oktató → úszásoktató

This is extremely common in Hungarian, and English speakers often need time to get used to it.

Segít is the present tense, third person singular form of the verb segít = to help.

So it can mean:

• he helps
• she helps
• it helps
• the swimming instructor helps

In this sentence, the subject is explicitly stated: Az úszásoktató.

It can mean any of those in the right context.

Hungarian present tense often covers several English possibilities:

• helps
• is helping
• sometimes does help

So Az úszásoktató segít. could mean:

• The swimming instructor helps.
• The swimming instructor is helping.

The exact English translation depends on context.

Because Hungarian does not need an auxiliary verb here.

English often uses helper verbs like:

• is helping
• does help

Hungarian simply uses the main verb form:

• segít

That single word already carries the basic tense and person information.

Yes. The sentence is perfectly complete as it is.

Az úszásoktató segít. simply means that the swimming instructor is helping, without saying whom.

If you want to add the person being helped, Hungarian often uses -nak/-nek:

• Az úszásoktató segít a gyereknek. = The swimming instructor helps the child.

That structure may feel different from English, where help usually takes a direct object.

A helpful breakdown is:

• ú-szás-ok-ta-tó

A few important pronunciation points:

• sz is pronounced like English s
• Hungarian s on its own is pronounced like English sh
• ó, ú, í, á are long vowels

So úszásoktató does not begin with a sh sound. The sz gives it an s sound.

Also, Hungarian stress normally falls on the first syllable of the word:

• Úszásoktató

The accents in Hungarian are not optional spelling marks. They are part of the word.

They usually show vowel length, and sometimes quality as well:

• u vs ú
• o vs ó
• i vs í
• a vs á

These differences matter in pronunciation and can also distinguish different words. So it is important to write and learn them correctly.

By itself, it does not show gender.

Hungarian does not have grammatical gender like many European languages, and third-person verbs do not change for he vs she.

So az úszásoktató can mean:

• the male swimming instructor
• the female swimming instructor

You only know from context unless extra information is added.

Yes, Hungarian word order is more flexible than English, but changing it usually changes the focus or emphasis.

The neutral version is:

• Az úszásoktató segít.

If you say:

• Segít az úszásoktató.

that can sound more like It is the swimming instructor who is helping or put more focus on the action/result.

So the original sentence is the most natural neutral order for a basic statement.