Provjerite posudu s pijeskom zbog nametnika.

Provjerite is the imperative form of provjeriti, meaning check or verify.

It is addressed to:

• you (plural), or
• you (formal singular)

So it can mean:

• Check! when speaking politely to one person
• Check! when speaking to several people

Related forms:

• Provjeri = informal singular check
• Provjerite = plural/formal check

Also, provjeriti is a perfective verb, so it suggests a complete check.

Because posudu is in the accusative singular.

The noun is:

• posuda = container, vessel, bowl (nominative singular)

But here it is the direct object of Provjerite, so Croatian uses the accusative:

• provjeriti posudu = to check the container

This is a very common pattern:

• Vidim kuću = I see the house
• Kupujem knjigu = I am buying a book
• Provjerite posudu = Check the container

Posuda is a general word for a container, vessel, dish, or sometimes bowl, depending on context.

It is a fairly broad noun, so the exact English translation depends on what kind of object is meant. In this sentence, container is usually the safest translation.

Because the preposition s meaning with requires the instrumental case.

So:

• pijesak = sand (nominative)
• s pijeskom = with sand (instrumental)

That is why Croatian says:

• posuda s pijeskom = a container with sand

This is a standard grammar rule:

• s vodom = with water
• s prijateljem = with a friend
• s pijeskom = with sand

S is the normal form of the preposition.

Sa is used only in some situations, usually to make pronunciation easier, for example before certain consonant clusters or with some pronouns.

Here, s pijeskom sounds natural, so sa is not needed.

Compare:

• s pijeskom = natural
• sa mnom = standard
• sa sestrom = often used for easier pronunciation

Zbog usually means because of, due to, or on account of.

So zbog nametnika literally means:

• because of pests/parasites
• due to pests/parasites

In context, English may translate this more naturally as for pests/parasites, meaning check it because pests may be present.

So the Croatian phrasing focuses more on the reason for checking than directly on the idea of checking for the presence of something.

It is understandable, but it can sound a little less direct than English check for parasites.

If you want to express check whether there are parasites/pests, Croatian often uses other structures, for example:

• Provjerite ima li nametnika u posudi s pijeskom. = Check whether there are any parasites/pests in the container with sand.
• Provjerite posudu s pijeskom na prisutnost nametnika. = Check the container with sand for the presence of parasites/pests.

So zbog nametnika is possible, but it sounds more like because of suspected parasites/pests than a literal one-to-one equivalent of English for.

After zbog, Croatian uses the genitive case.

The basic noun is:

• nametnik = parasite, pest

After zbog, it becomes:

• zbog nametnika

So this is genitive.

A useful rule:

• zbog + genitive

Examples:

• zbog kiše = because of the rain
• zbog problema = because of the problem / problems
• zbog nametnika = because of the parasite(s) / pests

Grammatically, it can be ambiguous.

For many masculine animate nouns, the genitive singular and genitive plural can have the same form. So nametnika can mean:

• of the parasite / because of the parasite, or
• of the parasites / because of the parasites

In this sentence, the most natural interpretation is usually plural or generic:

• because of pests/parasites
• for pests/parasites

So even though the form itself is ambiguous, the context usually makes it clear.

Nametnik can mean several related things, depending on context:

• parasite
• pest
• sometimes more generally a harmful organism living on or in something

So the best translation depends on the situation.

If the sentence is about hygiene, animals, sand, soil, or contamination, English might use:

• parasite
• pest
• occasionally infestation-causing organism

In everyday learning terms, parasite and pest are both good possibilities.

Because Croatian has no articles.

English says:

• the container
• a container

Croatian simply says:

• posuda / posudu

The meaning is understood from context.

So posudu s pijeskom could mean:

• the container with sand
• a container with sand

If Croatian wants to be more specific, it can use words like:

• ta posuda = that container
• ova posuda = this container

Yes. Croatian word order is more flexible than English.

The sentence:

• Provjerite posudu s pijeskom zbog nametnika.

is a neutral instruction.

But you could also say:

• Zbog nametnika provjerite posudu s pijeskom.

That puts more emphasis on the reason: because of pests/parasites.

Croatian often changes word order for emphasis, focus, or style, while the cases keep the roles clear.

This is a question of aspect.

• provjeriti = perfective → to check, complete the check
• provjeravati = imperfective → to be checking, to check repeatedly or habitually

So:

• Provjerite means check it as a complete action
• Provjeravajte would mean something more like keep checking or check regularly

In an instruction like this, Provjerite is natural because it asks for one completed inspection.