A jelszó fontos, ezért emlékszem rá.

In Hungarian, the verb to be is usually left out in the present tense, third person when you are saying that something is something or is some way.

So:

• A jelszó fontos. = The password is important.
• literally: The password important.

This is completely normal Hungarian. You would use forms of van only in other situations, such as:

• A jelszó fontos volt. = The password was important.
• A jelszó fontos lesz. = The password will be important.

A is the definite article, meaning the.

• a jelszó = the password
• egy jelszó = a password

Hungarian uses definite articles a lot, just like English does. Since this sentence is talking about a specific password, A jelszó is the natural form.

Jelszó means password.

It is a compound word:

• jel = sign, signal
• szó = word

So historically it is something like signal word or code word, but in modern Hungarian it simply means password.

Ezért means therefore, for this reason, or that’s why.

In this sentence:

• A jelszó fontos, ezért emlékszem rá.
• The password is important, therefore I remember it.

It connects the first idea to the second:

• the password is important
• because of that, I remember it

So ezért shows result or consequence.

Because the sentence contains two clauses:

• A jelszó fontos
• ezért emlékszem rá

Hungarian normally separates this kind of clause connection with a comma, especially when a linking word like ezért introduces the result.

So the comma is standard and natural here.

Emlékszem means I remember.

It comes from the dictionary form emlékezik = to remember.

Here it is in first person singular, present tense:

• én emlékszem = I remember

A few forms:

• emlékszem = I remember
• emlékszel = you remember
• emlékszik = he/she remembers
• emlékszünk = we remember

So the -em ending here tells you the subject is I.

Because the verb emlékezik does not take a direct object the way English remember does.

In Hungarian, you remember something/someone onto which your memory goes, so the verb takes the -ra/-re form.

The pattern is:

• emlékezik valamire = remember something
• literally something like remember onto something

So:

• A jelszóra emlékszem. = I remember the password.
• Emlékszem rá. = I remember it.

Using azt or őt would be wrong here, because those are direct-object forms, and emlékezik does not use a direct object.

Rá is the pronoun form that corresponds to the case ending -ra/-re.

Compare:

• jelszó → jelszóra = onto the password / the password after a verb that requires -ra
• ő / az-type pronoun in this case → rá = onto it / onto him / onto her, depending on context

In this sentence, rá refers back to a jelszó.

So:

• emlékszem rá = I remember it

This is a very common Hungarian pattern: instead of a plain object pronoun, you use the pronoun form required by the verb’s case.

Because rá is not only for people. It is the -ra/-re pronoun form, and it can refer to people or things, depending on the context.

For example:

• Gáborra emlékszem. = I remember Gábor.
• Rá emlékszem. = I remember him.

but also:

• A jelszóra emlékszem. = I remember the password.
• Rá emlékszem. = I remember it.

So in this sentence, rá simply means it, because the thing being referred to is a jelszó.

You can say that, and it is grammatical:

• A jelszó fontos, ezért emlékszem a jelszóra.

But Hungarian, like English, often avoids repeating the noun when it is already clear. So using rá sounds more natural and less repetitive:

• A jelszó fontos, ezért emlékszem rá.

This is similar to English preferring I remember it over repeating the password again.

Yes, both are possible, but they are not used in exactly the same way.

The neutral, ordinary order is:

• emlékszem rá = I remember it

If you move rá before the verb:

• rá emlékszem

that usually gives special emphasis or contrast, something like:

• It’s that that I remember
• I do remember that
• That one I remember

So in a simple neutral statement, emlékszem rá is the most natural choice.

Because the verb emlékezik requires the -ra/-re ending on the thing remembered.

Hungarian chooses between -ra and -re by vowel harmony. Since jelszó has back vowels, it takes -ra:

• jelszó → jelszóra

A few similar examples:

• név → névre
• cím → címre
• szám → számra

So if you use the full noun instead of the pronoun, you get:

• Emlékszem a jelszóra.

Yes, very often.

Depending on context, ezért can correspond to:

• so
• therefore
• that’s why
• for this reason

In this sentence, natural English translations could include:

• The password is important, so I remember it.
• The password is important, therefore I remember it.
• The password is important, that’s why I remember it.

The exact English wording can change, but the Hungarian structure stays the same.

Yes, it is natural and grammatically normal.

It contains several very typical Hungarian features:

• no present-tense is in A jelszó fontos
• ezért to show consequence
• emlékszik valamire with -ra/-re
• pronoun rá instead of repeating the noun

So it is a good example of how Hungarian often works quite differently from English even in a simple sentence.