Pošto se večeras radi o obiteljskom dogovoru, svi ćemo pokušati slušati jedni druge bez svađe.

Here pošto means since / because / as.

So:

• Pošto se večeras radi o obiteljskom dogovoru... = Since this evening is about a family agreement... = Because tonight this is a family discussion/agreement...

A learner might know pošto from other contexts, because it can also mean after in some sentences, and in everyday language it can even mean for how much / at what price in questions like Pošto je to? = How much is that?

Here, though, the meaning is clearly because/since.

Raditi se o is a fixed expression meaning:

• to be about
• to concern
• to be a matter of

So:

• radi se o obiteljskom dogovoru = it is about a family agreement = this concerns a family arrangement/discussion

This is not the ordinary verb raditi in the sense to work or to do.

Compare:

• Radim u školi. = I work in a school.
• Radi se o važnom problemu. = It is about an important problem.

The se is part of this expression.

Because the preposition o requires the locative case when it means about.

So:

• nominative: obiteljski dogovor
• locative: o obiteljskom dogovoru

This is a very common pattern in Croatian:

• govoriti o nečemu = to talk about something
• misliti o nečemu = to think about something
• raditi se o nečemu = to be about something

A few examples:

• o knjizi = about the book
• o problemu = about the problem
• o obiteljskom dogovoru = about the family agreement

Obiteljski means family-related / familial, and dogovor means agreement, arrangement, understanding, discussion that leads to agreement.

So obiteljski dogovor can mean:

• a family agreement
• a family arrangement
• sometimes a family discussion if the focus is on reaching agreement

It does not necessarily sound as formal as contract or official agreement. It often suggests that family members are trying to settle something together.

Večeras means this evening / tonight.

It sets the time for the whole situation:

• Pošto se večeras radi o obiteljskom dogovoru... = Since tonight this is about a family agreement...

Croatian often places time words fairly early in the sentence, but the word order is flexible.

You could imagine the meaning as:

• Because tonight we are dealing with a family matter...

This is the future tense.

Croatian future I is formed with:

• a form of htjeti used as an auxiliary
• plus the infinitive

Here:

• ćemo = we will
• pokušati = to try

So:

• pokušat ćemo or ćemo pokušati = we will try

In this sentence:

• svi ćemo pokušati = we will all try

A key point: ćemo is a clitic, so it often appears in the second position of its clause. Since svi comes first, ćemo follows it:

• Svi ćemo pokušati...

That is very natural Croatian word order.

Because pokušati means to try, and it is followed by another verb in the infinitive:

• pokušati + infinitive = to try to do something

So:

• pokušati slušati = to try to listen

This works much like English:

• We will try to listen

Croatian does not need a separate word corresponding to English to before the second verb here.

Jedni druge means each other / one another.

In this sentence:

• slušati jedni druge = to listen to each other

This is a reciprocal expression. Croatian changes its form depending on gender/number/case, but for a mixed group or a general plural group, jedni druge is very common.

A useful way to understand it is:

• jedni = some/ones
• druge = others
• together: one another / each other

Because slušati takes a direct object, druge here is in the appropriate object form.

Croatian can express reciprocity in different ways, but jedni druge is especially clear and emphatic when you want to say people should listen to one another.

So:

• slušati jedni druge = listen to each other

Using se with some verbs can express mutual action, but with slušati, jedni druge sounds very natural and clear in this context.

It also fits the meaning well because the sentence is about family members making an effort to hear one another calmly.

Because bez takes the genitive case.

Base noun:

• svađa = argument, quarrel

After bez:

• bez svađe = without argument / without quarrelling

This is a very important pattern:

• bez problema = without a problem
• bez vode = without water
• bez svađe = without quarrelling / without a fight

In natural English, this whole part is best understood as:

• without arguing
• without a quarrel
• without fighting

This is a very normal Croatian structure: a subordinate clause first, then the main clause.

So the sentence is:

• Pošto se večeras radi o obiteljskom dogovoru, subordinate clause: Since this evening is about a family agreement,

• svi ćemo pokušati slušati jedni druge bez svađe. main clause: we will all try to listen to each other without arguing.

Putting the reason first gives the sentence a logical flow:

1. this is a family matter
2. therefore everyone will try to behave calmly

This is very similar to English sentences like:

• Since this is a family discussion, we will all try to listen to each other calmly.

Yes, Croatian word order is flexible, though some versions sound more natural than others.

For example, these are possible:

• Pošto se večeras radi o obiteljskom dogovoru, svi ćemo pokušati slušati jedni druge bez svađe.
• Svi ćemo, pošto se večeras radi o obiteljskom dogovoru, pokušati slušati jedni druge bez svađe.

But the original is very natural because it presents the reason first.

Also, because ćemo is a clitic, it normally stays near the beginning of its clause:

• svi ćemo pokušati...

That part is less free than some other parts of the sentence.

Literally, it is closer to without a quarrel / without an argument.

But in smooth English, the best translation is often:

• without arguing
• without fighting
• without quarrelling

So a learner should remember two levels:

• literal grammar: bez + genitive noun
• natural meaning: without arguing

Both are useful, depending on whether you are studying grammar or trying to speak naturally.