Succesul este important.

Because Romanian usually puts the definite article at the end of the noun, not before it.

• succes = success
• succesul = the success

So -ul is the definite article here.

In a sentence like this, Romanian often uses the definite form to talk about a general idea or concept, especially with abstract nouns. So Succesul este important is a natural way to say that success, as a concept, is important.

Romanian normally attaches the to the noun itself.

So instead of:

• English: the success

you get:

• Romanian: succesul

This is a very common feature of Romanian grammar:

• băiatul = the boy
• cartea = the book
• succesul = the success

Este means is. It is the 3rd person singular form of a fi = to be.

So the structure is:

• Succesul = subject
• este = is
• important = adjective

Romanian usually needs this verb here, just like English does:

• Success is important
• Succesul este important

Yes. In everyday Romanian, e is a very common shorter form of este.

So both are correct:

• Succesul este important.
• Succesul e important.

The version with este may sound a little more formal or careful, while e is very common in speech.

Because the adjective has to agree with the noun in gender and number.

Succes is a neuter singular noun. In Romanian, neuter nouns use the same adjective form as masculine in the singular. That is why you get:

• succes important
• succesul este important

Compare:

• masculine singular: băiat important
• feminine singular: idee importantă
• neuter plural: succese importante

So important is the correct singular form here.

Succes is a neuter noun.

That matters because Romanian adjectives and articles depend on gender and number.

A useful thing to remember about Romanian neuter nouns is:

• in the singular, they behave like masculine
• in the plural, they behave like feminine

So:

• singular: succes important
• plural: succese importante

A simple learner-friendly pronunciation is:

• succesul ≈ sook-CHES-ool
• este ≈ YES-te
• important ≈ im-por-TANT

The main stress is:

• succes
• este
• important

So the whole sentence sounds roughly like:

sook-CHES-ool YES-te im-por-TANT

The normal, neutral word order is:

• Succesul este important.

That is the most straightforward way to say it.

Romanian can sometimes change word order for emphasis, but that makes the sentence more marked or literary. For a learner, the best pattern to remember is:

noun + a fi + adjective

So this sentence is a very good basic model.

Grammatically, people may understand you, but it is not the most natural version for this general statement.

For a broad statement about the concept of success, Romanian usually prefers:

• Succesul este important.

Using succesul makes the sentence sound more natural and idiomatic when talking about success in general.

It follows a very common Romanian pattern:

Subject + form of a fi + adjective

Here that gives:

• Succesul = subject
• este = form of a fi
• important = adjective

You can reuse this pattern with many other words:

• Timpul este prețios. = Time is valuable.
• Sportul este sănătos. = Sport is healthy.
• Exercițiul este util. = Exercise is useful.