Ako nemaš veliki ribež, možeš naribati mrkvu na onom malom.

In Croatian, the negative form of imati (to have) is usually written as one word:

• imam = I have
• nemam = I don’t have
• imaš = you have
• nemaš = you don’t have

So:

• Ako nemaš veliki ribež... = If you don’t have a big grater...

This is just the normal way Croatian forms the negative of imati in everyday use.

Ako means if.

It introduces a condition:

• Ako nemaš veliki ribež, možeš...
  = If you don’t have a big grater, you can...

This is a very common pattern in Croatian:

• Ako + present tense, present tense / future / modal
• Ako imaš vremena, dođi. = If you have time, come.
• Ako ne znaš, pitaj. = If you don’t know, ask.

So the whole sentence is structured just like an English if sentence.

Here veliki ribež is the direct object of nemaš.

• ribež = grater
• veliki ribež = a big grater

For masculine inanimate nouns, the accusative singular is often the same as the nominative singular, so the form does not change:

• veliki ribež = nominative
• veliki ribež = accusative

That is why it looks unchanged.

A learner may also hear that negation sometimes affects object case in Croatian. That is true in some contexts, but in ordinary modern usage with nemati, the accusative is very common and natural here.

Yes. Ribež means grater — the kitchen tool used for grating food.

So:

• veliki ribež = a big grater
• mali ribež = a small grater

Depending on region or speaker, you may also hear other related words, but ribež is a standard and very common word.

Naribati is a perfective verb, meaning to grate something up / grate it completely. It focuses on the completed result.

• ribati = to grate, to be grating, to grate in general
• naribati = to grate up, to finish grating

In this sentence, the idea is:

• you can grate the carrot
  not
• you can be grating carrot in general

So možeš naribati sounds natural because it refers to successfully completing the action.

Compare:

• Ribam mrkvu. = I am grating the carrot.
• Naribao sam mrkvu. = I grated the carrot / I have grated the carrot.

Because mrkvu is the accusative singular form of mrkva (carrot).

It is the direct object of naribati:

• mrkva = carrot (dictionary form, nominative)
• mrkvu = carrot (accusative)

This is very common for feminine nouns ending in -a:

• žena → ženu
• jabuka → jabuku
• mrkva → mrkvu

So:

• naribati mrkvu = to grate a/the carrot

Because Croatian often leaves out a noun when it is obvious from context.

Here:

• na onom malom literally means on that small one
• The omitted noun is ribežu

So the full version would be:

• na onom malom ribežu

But since ribež was already mentioned, Croatian naturally drops it.

This works much like English:

• If you don’t have the big grater, you can use the small one.

Croatian does the same thing with adjectives and pronouns:

• Želim plavu majicu, ne crvenu. = I want the blue T-shirt, not the red one.
• Uzmi veliki tanjur, ne mali. = Take the big plate, not the small one.

Onom malom is in the locative singular.

Why? Because it comes after na in the sense of location/surface:

• na ribežu = on the grater
• na onom malom (ribežu) = on that small one

The words agree with the omitted noun ribežu, which is masculine singular locative:

• onom = that, locative singular masculine/neuter
• malom = small, locative singular masculine/neuter

So the grammar is:

• na + locative → na onom malom (ribežu)

This is an important idiomatic difference.

In Croatian, when talking about grating food, it is very natural to say:

• naribati na ribež
• naribati na sitno
• naribati na krupno

The idea is that you grate something on the grater’s surface.

So:

• mrkvu na onom malom = the carrot on that small one

English often prefers with, but Croatian commonly uses na here.

You may also hear forms with the instrumental in some contexts, but na ribežu / na onom malom is very idiomatic and natural.

Both taj (that) and onaj (that over there / that one) can point to something already known from context, but they are not exactly identical.

Here onom malom means something like:

• that small one
• that smaller one / the small one there

In many real-life contexts, tom malom could also be possible depending on tone and situation. Croatian demonstratives are flexible, and speakers do not always use them exactly the way English learners expect.

So the sentence uses onom naturally, but the main thing to understand is that it points back to the previously mentioned grater.

They are the same adjective, just in different forms.

• mali = basic form, like dictionary form (small)
• malom = locative singular masculine/neuter

Why the change?

Because it agrees with the implied noun ribežu:

• mali ribež = a small grater
• na malom ribežu = on a small grater
• na onom malom = on that small one

Croatian adjectives must match the noun in:

• gender
• number
• case

That is why the ending changes.

Yes. A fully expanded version would be:

• Ako nemaš veliki ribež, možeš naribati mrkvu na onom malom ribežu.

That makes the structure easier to see:

• Ako = if
• nemaš veliki ribež = you don’t have a big grater
• možeš naribati mrkvu = you can grate the carrot
• na onom malom ribežu = on that small grater

The original sentence simply omits ribežu because it is already understood.

The given word order is natural, but Croatian word order is fairly flexible.

Original:

• Ako nemaš veliki ribež, možeš naribati mrkvu na onom malom.

Possible variations include:

• Ako nemaš veliki ribež, mrkvu možeš naribati na onom malom.
• Mrkvu možeš naribati na onom malom ako nemaš veliki ribež.

The meaning stays basically the same, but the focus changes slightly.

The original version sounds neutral and natural: first the condition, then the suggestion.

Here možeš means can in the practical sense of it is possible / you are able to / you can simply do this instead.

So:

• možeš naribati mrkvu na onom malom = you can grate the carrot on the small one

It sounds like a helpful suggestion or alternative, not formal permission.

In everyday Croatian, moći often works exactly like English can:

• Možeš doći sutra. = You can come tomorrow.
• Ne mogu otvoriti vrata. = I can’t open the door.

Yes, it sounds natural and idiomatic.

A speaker is saying something like:

• If you don’t have a big grater, you can grate the carrot on that small one.

The sentence uses very normal everyday features of Croatian:

• ako for if
• nemati in the negative
• a perfective verb (naribati) for a completed action
• omission of a repeated noun (onom malom)
• na with a grater

So it is a very useful real-world sentence for a learner.