A felhasználó aktív.

A is the definite article in Hungarian, equivalent to English the.

So:

• a felhasználó = the user

Hungarian has two forms of the definite article:

• a before most consonants
• az before vowels

Examples:

• a felhasználó = the user
• az alkalmazás = the application

Because a means the, while egy means a / an.

So the choice depends on whether you mean a specific user or just any user:

• A felhasználó aktív. = The user is active.
• Egy felhasználó aktív. = A user is active.

If the original meaning in English is definite, Hungarian uses a.

In Hungarian, the verb to be is often left out in the present tense when talking about he/she/it or singular/plural third person.

So:

• A felhasználó aktív. literally looks like The user active
• but it means The user is active

This omission is completely normal.

Compare:

• Én aktív vagyok. = I am active.
• Te aktív vagy. = You are active.
• A felhasználó aktív. = The user is active.

In third person present tense, Hungarian usually does not say van here.

In this sentence, aktív is a predicate adjective, not an adjective directly attached to the noun.

Compare the two patterns:

• A felhasználó aktív. = The user is active.
  Here aktív describes the subject as part of the statement.

• Az aktív felhasználó = the active user
  Here aktív comes before the noun because it directly modifies it.

So:

• before the noun = attributive adjective
• after the noun = predicate adjective

No. Hungarian does not have grammatical gender.

So felhasználó can mean:

• male user
• female user
• user of unspecified gender

Hungarian nouns do not change for masculine/feminine/neuter, and adjectives do not agree in gender either.

That is very different from languages like German, French, or Spanish.

Felhasználó is a noun meaning user.

In this sentence it is:

• singular
• definite because of a
• in the subject role

So the structure is:

• A felhasználó = the subject
• aktív = the predicate adjective

The accent marks in Hungarian are very important. They are not optional.

In this sentence:

• ó in felhasználó
• í in aktív

These marks usually show that the vowel is longer than the short version:

• o vs ó
• i vs í

So spelling and pronunciation both change with the accent. In Hungarian, vowel length can change the word, so learners should pay close attention to it.

A rough English-friendly guide:

• felhasználó ≈ fel-has-naa-loh
• aktív ≈ awk-teev

A few helpful notes:

• sz is pronounced like English s
• plain s in Hungarian is pronounced like English sh
• á is a broad long vowel, somewhat like the vowel in father
• í is like a long ee
• stress is always on the first syllable of each word in Hungarian

So:

• FEL-hasz-naa-loh
• AK-teev

Yes, Aktív a felhasználó is possible, but it changes the focus or emphasis.

• A felhasználó aktív. = neutral statement: The user is active.
• Aktív a felhasználó. = emphasis on active, something like The user is active or It is active that the user is depending on context.

Hungarian word order is more flexible than English, but it often reflects information structure such as:

• topic
• focus
• emphasis
• contrast

So the original sentence is the most neutral version.

Usually, in a normal full sentence, you would keep the article:

• A felhasználó aktív.

Without a, Felhasználó aktív sounds unnatural as a regular sentence. However, article omission can happen in:

• titles
• labels
• headlines
• interface text
• very telegraphic style

For normal grammar practice, use a felhasználó.

Because aktív is an adjective, while aktívan is an adverb.

Here you are describing the user, so you need an adjective:

• A felhasználó aktív. = The user is active.

If you wanted to describe how someone does something, you would use the adverb:

• A felhasználó aktívan részt vesz. = The user participates actively.

So:

• aktív = active
• aktívan = actively

The plural would be:

• A felhasználók aktívak. = The users are active.

Notice two changes:

1. The noun becomes plural:

   • felhasználó → felhasználók

2. The adjective also takes a plural ending in this kind of sentence:

   • aktív → aktívak

So Hungarian often marks plurality on both the noun and the predicate adjective in this structure.

Yes. It is related to the verb felhasznál = to use up / utilize / make use of.

The ending -ó often forms a person or thing that does the action, similar to English -er in some cases.

So very roughly:

• felhasznál = use, utilize
• felhasználó = user

This is a useful pattern to notice, although not every word maps perfectly onto English word formation.