Večeras neću izaći, jer sam umorna.

Večeras means tonight / this evening and is used as an adverb of time.

• Večeras neću izaći. = I’m not going out tonight.

By contrast:

• veče or večer = evening as a noun
• ovo veče / ova večer = this evening
• tokom večeri = during the evening

So in this sentence, večeras is the natural choice because it tells us when the action happens.

Neću is the standard written form of the negative future of hteti (to want, but also used to form the future tense).

• hoću = I will / I want
• neću = I will not

So:

• Neću izaći = I will not go out

This is just how Serbian writes this form: the negative future forms are commonly written as single words:

• neću = I won’t
• nećeš = you won’t
• neće = he/she/it won’t
• nećemo = we won’t
• nećete = you won’t
• neće = they won’t

Yes. Izaći literally means to go out, to exit, or to leave.

In this sentence, it naturally means to go out in the everyday social sense:

• Večeras neću izaći = I’m not going out tonight

This could mean:

• not going out socially
• not leaving the house
• not going somewhere this evening

The exact nuance depends on context, just like English go out.

This is about aspect, which is very important in Serbian.

• izaći = perfective
• izlaziti = imperfective

In a sentence like this, izaći is normal because it refers to a single complete event in the future:

• Večeras neću izaći. = I won’t go out tonight.

If you used izlaziti, it would sound more like a repeated, habitual, or ongoing action, depending on context.

So:

• neću izaći = I won’t go out tonight (one event)
• neću izlaziti = I won’t be going out / I won’t go out repeatedly

For this sentence, izaći is the natural choice.

It is the future tense.

Serbian often forms the future with forms of hteti plus the infinitive:

• ću izaći = I will go out
• neću izaći = I will not go out

So the structure is:

• neću = future auxiliary in negative form
• izaći = infinitive

Together: I will not go out.

In everyday English, this may also be translated as I’m not going out tonight, even though Serbian is formally using the future.

Because Serbian often omits subject pronouns when the verb already shows who the subject is.

Here:

• neću already means I will not
• sam already means I am

So ja is not necessary.

• Večeras neću izaći, jer sam umorna. = natural
• Ja večeras neću izaći, jer sam umorna. = also possible, but more emphatic

You would include ja if you wanted contrast or emphasis, for example:

• Ja večeras neću izaći, ali on hoće.
• I’m not going out tonight, but he is.

Because sam is the present-tense form of biti (to be) for I am.

So:

• sam umorna = I am tired

Serbian normally uses the verb to be here, unlike in some languages where it may be omitted.

Breakdown:

• sam = am
• umorna = tired (feminine form)

So jer sam umorna literally means because I am tired.

Umorna is the feminine singular form, so it tells us the speaker is female.

Forms:

• umoran = masculine singular
• umorna = feminine singular
• umorno = neuter singular

So:

• A woman says: Jer sam umorna.
• A man says: Jer sam umoran.

This is very common in Serbian: adjectives agree with the gender and number of the person or thing they describe.

Jer means because.

So:

• Večeras neću izaći, jer sam umorna.
• I won’t go out tonight, because I’m tired.

You can often replace jer with zato što, which also means because:

• Večeras neću izaći zato što sam umorna.

Both are correct. Very roughly:

• jer is short and very common
• zato što can sound a little more explicit or emphatic

In many everyday situations, they are interchangeable.

In Serbian, a clause introduced by jer is normally separated by a comma.

So:

• Večeras neću izaći, jer sam umorna.

This is standard punctuation: the first clause gives the statement, and the second clause gives the reason.

Yes, Serbian word order is fairly flexible, but not every version sounds equally natural.

The neutral, natural order here is:

• Večeras neću izaći, jer sam umorna.

Other orders are possible for emphasis, for example:

• Neću izaći večeras, jer sam umorna.
• Jer sam umorna, večeras neću izaći.

These all make sense, but they shift emphasis slightly.

Also, sam is a clitic, so it usually cannot stand freely in just any position. Serbian clitic placement follows its own rules, which is why jer sam umorna sounds natural.

A few sounds may be unfamiliar to English speakers:

• ć is a soft sound, somewhat like a very soft ch/t sound
• č is a harder ch sound, like in church

Approximate pronunciation:

• neću ≈ NEH-ću
• izaći ≈ ee-ZA-ći

Also:

• c in Serbian is pronounced ts
• stress is not usually marked in normal writing

If you are just starting, the most important thing is to notice that ć is softer than č.

Usually, the most natural meaning is I’m not going out tonight.

Because izaći literally means to go out / come out / exit, context could sometimes allow other interpretations, but without additional context, most speakers will understand it as:

• not going out socially, or
• not leaving the house tonight

So I’m not going out tonight, because I’m tired is the best default understanding.

This sentence is compatible with standard Serbian, and the key word here is večeras, which is the same in both.

The main variation you might notice in related vocabulary is:

• Ekavian: veče
• Ijekavian: večer

But večeras, neću, izaći, jer sam umorna all work normally here. So the sentence itself does not strongly force one variety over the other in the way some other sentences might.