Hun oppnådde suksess.

Hun means she. It is the subject pronoun in the sentence, so it tells you who performed the action.

In Hun oppnådde suksess, hun is the person who achieved success.

Oppnådde is the past tense of the verb oppnå, which means to achieve, to attain, or to reach.

So:

• å oppnå = to achieve
• oppnår = achieves / is achieving
• oppnådde = achieved
• har oppnådd = has achieved

In this sentence, oppnådde shows that the action happened in the past.

Norwegian is generally a V2 language, which means the finite verb usually comes in the second position in main clauses.

In this sentence:

• Hun = first element
• oppnådde = finite verb, so it comes second
• suksess = object

This is the normal word order for a simple statement in Norwegian.

Suksess means success. It is a normal Norwegian noun, even though it looks very similar to the English word.

It is an en-word:

• en suksess = a success
• suksessen = the success
• suksesser = successes
• suksessene = the successes

So yes, it is fully integrated into Norwegian grammar.

Because oppnå suksess works much like English achieve success. In both languages, success can be used as an uncountable / abstract noun in this kind of expression, so no article is needed.

Compare:

• Hun oppnådde suksess. = She achieved success.
• Hun ble en suksess. = She became a success.

In the first sentence, suksess is treated as the general idea of success. In the second, en suksess means a success, often referring to a person, project, film, book, etc. that was successful.

Yes, it is correct and understandable. It sounds a bit formal or written, but it is perfectly good Norwegian.

Depending on context, Norwegian speakers might also say things like:

• Hun ble vellykket. = She became successful.
• Hun fikk stor suksess. = She had great success.
• Hun gjorde det stort. = She made it big.
• Hun lyktes. = She succeeded.

So oppnådde suksess is fine, but it is not the only natural way to express the idea.

The infinitive is å oppnå.

This verb is made up of:

• opp- = up
• nå = reach

So the basic idea is something like reach/attain. In actual usage, oppnå means achieve or attain.

You will often see it with things like:

• oppnå et mål = achieve a goal
• oppnå gode resultater = achieve good results
• oppnå suksess = achieve success

A rough English-friendly pronunciation is:

opp-NO-de

A few helpful points:

• å sounds like a long vowel somewhat like the vowel in British law, but not exactly the same
• the stress is mainly on nå
• the ending -dde is pronounced clearly, though not heavily

And suksess is roughly:

sook-SESS

with the stress on the last syllable.

This is the difference between the preterite and the present perfect.

• Hun oppnådde suksess. = She achieved success.
  This presents the action as a completed past event.

• Hun har oppnådd suksess. = She has achieved success.
  This connects the past achievement more directly to the present.

In many contexts, both are possible, but they are used a little differently depending on whether you are focusing on the past event itself or its present relevance.

Yes. Even though it often refers to success in a general sense, it can also be countable.

Forms:

• en suksess
• suksessen
• suksesser
• suksessene

Examples:

• Filmen var en suksess. = The film was a success.
• De hadde flere suksesser. = They had several successes.

But in Hun oppnådde suksess, it is being used in the general abstract sense, not as a countable item.

Yes. The structure stays the same:

• Jeg oppnådde suksess. = I achieved success.
• Du oppnådde suksess. = You achieved success.
• Han oppnådde suksess. = He achieved success.
• Vi oppnådde suksess. = We achieved success.
• De oppnådde suksess. = They achieved success.

So this sentence is a useful model for practicing past tense word order in Norwegian.