Preskoči ovaj potez.

Preskoči is the singular informal imperative of preskočiti, a perfective verb meaning to skip, to pass over, or to leave out.

So in this sentence, it means Skip ...! said to one person.

Because the verb is perfective, it points to one completed action: skip this specific thing.

Preskočiti is the infinitive, meaning to skip.

In commands, Serbian usually uses the imperative, not the infinitive.
So:

• preskočiti = to skip
• preskoči = skip! (to one person, informal)

That is why the sentence says Preskoči ovaj potez, not Preskočiti ovaj potez.

Ovaj means this.

It matches the noun potez in:

• gender: masculine
• number: singular
• case: accusative

So ovaj potez = this move / this step / this turn, depending on context.

Because potez is the direct object of the verb preskoči, it is in the accusative case.

For a masculine inanimate noun like potez, the accusative singular looks the same as the nominative singular:

• nominative: ovaj potez
• accusative: ovaj potez

So even though it is the object, the form does not change here.

Not always. Potez has several related meanings depending on context, such as:

• move (in a game, like chess)
• turn
• step
• action
• stroke (for example, a brush stroke or pen stroke)

In Preskoči ovaj potez, the most natural translation depends on the situation:

• in a game: Skip this move or Skip this turn
• in instructions: Skip this step
• more generally: Skip this action

It is informal singular: a command to one person you address with ti.

The formal or plural version would be:

Preskočite ovaj potez.

That can mean:

• speaking politely to one person
• speaking to more than one person

So:

• Preskoči = informal singular
• Preskočite = formal singular or plural

Yes, Serbian word order is fairly flexible, but Preskoči ovaj potez is the most neutral and natural order.

You might also see:

• Ovaj potez preskoči.

This can sound more marked, with extra emphasis on this move/step.

So the original order is usually best for a plain instruction.

Starting with the verb is very common in Serbian commands.

So Preskoči ovaj potez sounds natural because the command comes first:

• Preskoči = Skip
• ovaj potez = this move / this step

English also often does this in commands: Skip this step.

A simple pronunciation guide is:

PRES-ko-chee OH-vai PO-tez

A few notes:

• č sounds like ch in church
• j sounds like y in yes
• stress is not usually marked in normal writing, but this approximation will be understood well

So:

• Preskoči ≈ PRES-ko-chee
• ovaj ≈ OH-vai
• potez ≈ PO-tez

It is possible as a form, but it means something a bit different.

• preskoči = perfective imperative, skip it as a single complete action
• preskači = imperfective imperative, more like keep skipping, skip repeatedly, or sometimes a more general instruction

In this sentence, Preskoči ovaj potez is the natural choice because it refers to one specific move/step.

A very common way is:

Nemoj preskočiti ovaj potez.
informal singular

Formal/plural: Nemojte preskočiti ovaj potez.

You may also hear Ne preskači ovaj potez, but nemoj + infinitive is a very standard and clear way to make a negative command in Serbian.