Idite dolje i pričekajte.

The ending -te marks the imperative for:

• you plural = when speaking to more than one person
• formal/polite you singular = when speaking politely to one person

So Idite dolje i pričekajte. can mean either:

• speaking to several people
• speaking politely to one person

That is why both verbs use the same -te ending.

If you were talking to one person informally, you would usually say:

Idi dolje i pričekaj.

Compare:

• idi = go! (singular informal)
• idite = go! (plural or formal)
• pričekaj = wait! (singular informal)
• pričekajte = wait! (plural or formal)

Croatian usually does not need a subject pronoun when it is already clear from the verb ending.

In idite and pričekajte, the ending already tells you that the command is directed to:

• more than one person, or
• one person formally

So adding vi is usually unnecessary.

You could say Vi idite dolje i pričekajte, but that would sound emphatic, marked, or contrastive rather than neutral.

Dolje is an adverb, not a noun or adjective. It means:

• down
• downstairs
• sometimes down there, depending on context

In this sentence, it most naturally means downstairs or down below.

Because it is an adverb, it does not change form.

A colloquial/regional variant you may also hear is dole.

This is mainly about aspect, which is very important in Croatian verbs.

• čekati = imperfective → to wait, be waiting
• pričekati = perfective → to wait a bit, wait until something happens, complete the waiting action

In commands like this, Croatian often prefers a perfective verb when asking for a single complete action.

So:

• Pričekajte. = Wait a moment / wait until...
• Čekajte. = more like Wait / keep waiting / be waiting

In many situations, pričekajte sounds more natural if the speaker means go there and wait until further notice or until something/someone arrives.

Yes. The basic verb is čekati (to wait).
The form pričekajte comes from pričekati, which adds the prefix pri-.

That prefix helps create a perfective verb. In this case, it gives the sense of:

• waiting for a bit
• waiting until something happens
• treating the waiting as a completed action

So čekati and pričekati are closely related, but they are not identical in usage.

Croatian commonly expresses this kind of sequence with two imperatives:

• Idite = go
• pričekajte = wait
• i = and

So Idite dolje i pričekajte. is a very normal structure.

English often says go down and wait, and Croatian does the same thing structurally.

An infinitive would not usually replace the second imperative in this sentence without changing the structure or style. The original version is direct and natural.

Not completely. Croatian word order is fairly flexible, but different orders can shift the focus or sound more or less natural.

The original:

Idite dolje i pričekajte.

is very natural.

Other orders are possible, but they may change emphasis:

• Idite i pričekajte dolje.
  This can put more focus on where the waiting happens.

• Dolje idite i pričekajte.
  This is more marked and sounds less neutral.

So the original order is a good default.

Not necessarily. In Croatian, imperatives are often perfectly normal, especially when giving:

• instructions
• directions
• practical orders
• service-related requests

Whether it sounds rude depends a lot on:

• tone of voice
• context
• relationship between speakers

If you want to make it softer or more polite, you can add something like:

• molim vas = please
• Idite dolje i pričekajte, molim vas.

That sounds more explicitly polite.

A few pronunciation points are especially useful here:

• č sounds like ch in church
• j sounds like y in yes
• Croatian words are usually pronounced quite clearly, letter by letter

So pričekajte is approximately:

pree-che-KAI-teh

And idite is approximately:

EE-dee-teh

And dolje is approximately:

DOHL-yeh

These are only rough English-friendly guides, but they help with the main sounds.

Yes, sometimes Croatian can use a more compact verb such as siđite or spustite se, depending on context.

For example:

• Siđite i pričekajte. = Go down / come down and wait.

But Idite dolje is still completely natural and very easy to understand. It is a straightforward way to say the idea without using a more specific motion verb.