Dosarul este incomplet.

Because -ul is the definite article attached to the end of the noun in Romanian.

• dosar = a file / a dossier
• dosarul = the file / the dossier

Romanian usually puts the definite article at the end of the noun, unlike English, which uses a separate word such as the.

So in this sentence, dosarul means the file.

Este is the 3rd person singular of the verb a fi = to be.

So:

• eu sunt = I am
• tu ești = you are
• el/ea este = he/she/it is

In Dosarul este incomplet, este simply means is.

In everyday speech, Romanians often use the shorter form e:

• Dosarul e incomplet.

This means the same thing and sounds very natural.

Because the adjective must agree with the noun, and dosar is a neuter noun.

In Romanian, neuter nouns behave:

• like masculine in the singular
• like feminine in the plural

Since dosarul is singular, the adjective takes the masculine singular form:

• incomplet = masculine/neuter singular
• incompletă = feminine singular

So:

• dosarul este incomplet = correct
• cartea este incompletă = correct, because carte is feminine

It is neuter.

That matters because Romanian neuter nouns change their agreement pattern depending on number:

• singular: they behave like masculine
• plural: they behave like feminine

So you get:

• singular: dosarul este incomplet
• plural: dosarele sunt incomplete

Notice how the adjective changes from incomplet to incomplete in the plural.

Normally, in a full Romanian sentence like this, no. Romanian usually keeps the verb to be in the present tense.

So the standard sentence is:

• Dosarul este incomplet.
• or more conversationally: Dosarul e incomplet.

If you say only dosarul incomplet, that is usually not a complete sentence. It sounds more like a noun phrase, such as the incomplete file.

The normal, neutral word order is:

Subject + verb + adjective

• Dosarul = subject
• este = verb
• incomplet = adjective/predicative complement

So Dosarul este incomplet is the most natural default order.

You may sometimes see different word order for emphasis, but for a learner, this standard pattern is the safest and most useful one.

Dosar often means a file, folder, case file, or dossier, depending on context.

It is a very common word in administrative and bureaucratic Romanian. For example, it can refer to:

• a set of official documents
• an application file
• a legal case file
• a physical folder with papers in it

So in real life, Dosarul este incomplet is something you might hear in an office, at a government institution, or when submitting paperwork.

The plural is:

Dosarele sunt incomplete.
= The files are incomplete.

Breakdown:

• dosarele = the files
• sunt = are
• incomplete = incomplete (plural form)

This is a good example of how a neuter noun behaves like feminine in the plural.

A natural negative version is:

Dosarul nu este complet.
or
Dosarul nu e complet.

This literally means The file is not complete.

Romanian often uses either:

• nu este complet = not complete
• este incomplet = is incomplete

These are very close in meaning. In many situations, they are interchangeable.

A helpful approximate pronunciation is:

doh-SAH-rul YES-teh een-kohm-PLET

A few notes:

• dosarul has the stress on SAH
• este is usually pronounced YES-te
• incomplet has final stress: -PLET

In natural speech, many speakers say:

• Dosaru’ e incomplet

That is more colloquial pronunciation, where the final -l in dosarul may sound reduced in fast speech. But as a learner, it is best to start with the full clear form:

• Dosarul este incomplet.

Yes, it sounds fairly neutral and is especially common in formal or administrative contexts.

You could hear it:

• at a public office
• in a bank
• at a university office
• in legal or official paperwork situations

It is not unusually stiff, though. It is simply a normal, correct sentence, especially when talking about documents or applications.