Radni odnos na neodređeno vreme je važan.

Not exactly.

Radni odnos literally means employment relationship or employment status. It is a legal/labor-law term, so it sounds more formal than posao (job).

• radni odnos = employment relationship, formal employment
• posao = job, work, a more general everyday word

So in this sentence, radni odnos refers to being formally employed, not just having some kind of work.

It means for an indefinite period or for an unlimited duration.

In employment language, radni odnos na neodređeno vreme is the standard way to say permanent employment or an open-ended work contract.

A very common contrast is:

• na određeno vreme = for a fixed period, temporary
• na neodređeno vreme = for an indefinite period, permanent

So this phrase is especially common in legal, HR, and administrative Serbian.

Because the main noun in the subject is odnos, and odnos is masculine singular.

The adjective važan has to agree with the noun it describes in gender and number:

• masculine singular: važan
• feminine singular: važna
• neuter singular: važno
• masculine plural: važni

Here, the subject is:

• radni odnos → head noun = odnos → masculine singular

So the correct form is važan.

Because the subject is singular: radni odnos.

Even though the subject contains several words, its grammatical core is still one singular noun:

• odnos = singular

So Serbian uses singular je (is), not plural su (are).

This is a fixed expression, and vreme here is in the accusative singular.

The pattern is:

• na određeno vreme
• na neodređeno vreme

Since vreme is a neuter noun, its nominative and accusative singular look the same:

• nominative: vreme
• accusative: vreme

So you do not see a form change, but grammatically it is accusative in this phrase.

Neodređeno is the neuter singular form of the adjective neodređen (indefinite, unspecified).

It agrees with vreme, which is a neuter noun:

• određen rok = a fixed deadline/term
• određeno vreme = a fixed period
• neodređeno vreme = an indefinite period

So neodređeno is not describing odnos here; it is describing vreme.

Yes. Serbian word order is more flexible than English word order.

The neutral order here is:

• Radni odnos na neodređeno vreme je važan.

But you could also say:

• Važan je radni odnos na neodređeno vreme.

That version puts more emphasis on važan.

In everyday usage, the original sentence sounds neutral and natural.

Yes, fairly formal.

The phrase radni odnos na neodređeno vreme is standard in formal, legal, and administrative contexts. A more everyday speaker might say something like:

• Stalan posao je važan. = A permanent job is important.
• Važno je imati stalan posao. = It is important to have a permanent job.

The original sentence is perfectly natural, but it sounds more official.

They are similar, but not identical.

• radni odnos na neodređeno vreme = formal/legal concept of permanent employment
• stalan posao = permanent/steady job, more everyday and broader

So if you are talking about contracts, legal status, or HR documents, radni odnos na neodređeno vreme is the better choice.

Because Serbian has no articles.

English says:

• a permanent job
• the employment relationship

Serbian usually expresses definiteness from context, not with articles. So:

• Radni odnos na neodređeno vreme je važan.

can mean something like Permanent employment is important or A permanent employment relationship is important, depending on context.

Very often, yes.

Vreme can mean time, period, or weather, depending on context. In this sentence it means period/duration, not weather.

Examples:

• dugo vreme = a long time
• kratko vreme = a short time
• određeno vreme = a fixed period
• neodređeno vreme = an indefinite period

So here it is part of a standard expression about duration.

The whole noun phrase would decline, and the key changes would be:

• radni odnos → radnog odnosa
• na neodređeno vreme usually stays the same as a fixed phrase

Example:

• bez radnog odnosa na neodređeno vreme = without permanent employment

This is useful because learners often want to know which parts change. The main noun phrase declines, while na neodređeno vreme usually remains unchanged as an embedded prepositional phrase.

Normally, no—not in standard Serbian.

The full established expression is:

• na neodređeno vreme

In casual speech, people sometimes shorten common phrases, but for correct standard usage, especially in writing, you should keep vreme.

So the full sentence should remain:

• Radni odnos na neodređeno vreme je važan.