Oružje je u stanu.

Stanu is in the locative singular.

After u when it means in / inside / at a place, Croatian normally uses the locative case to show location:

• u stanu = in the apartment
• u kući = in the house
• u školi = at school / in the school

The basic dictionary form is stan. In the locative singular, it becomes stanu.

A very useful contrast is:

• u stanu = in the apartment → location
• u stan = into the apartment → movement/direction

So in Oružje je u stanu, the meaning is static location, so u stanu is correct.

Because u can express two different ideas:

1. location = in, at

   • takes the locative
   • u stanu = in the apartment

2. motion toward a place = into

   • takes the accusative
   • ulazi u stan = he/she is going into the apartment

This is very common in Croatian and other Slavic languages. English often uses different prepositions like in vs into, but Croatian often uses the same preposition and changes the case instead.

Oružje is neuter singular.

A good clue is the ending -e, which is very often neuter in Croatian. Also, the verb agrees with it as singular:

• Oružje je... = The weapon / оружje is...
• je = is

So grammatically, Croatian treats oružje as singular neuter in this sentence.

It can be a little tricky for English speakers.

Oružje is grammatically singular, but it often functions like a collective or mass noun, similar to weaponry or arms in English. Depending on context, it can refer to:

• a weapon
• weapons
• weaponry / arms

So even though the verb is singular (je), the meaning in English may vary depending on the situation.

Because Croatian does not have articles like a / an / the.

So:

• oružje can mean a weapon, the weapon, or weaponry
• stan can mean an apartment, the apartment, etc.

Croatian usually leaves this to context. If the speaker and listener already know which apartment or which weapon is meant, the sentence can naturally be understood as The weapon is in the apartment.

Yes, the word order can change, but je is a clitic, and clitics tend to go near the second position in a clause.

In the neutral sentence:

• Oružje je u stanu.

This is very natural.

You may also hear:

• U stanu je oružje.

This puts more focus on where it is.

Croatian word order is more flexible than English, but it is not random. Changing the order often changes the emphasis or topic/focus of the sentence.

A rough pronunciation is:

o-ROOZH-ye

More carefully:

• o as in a short o
• ru with a rolled or tapped r
• ž like the s in measure
• je here sounds roughly like ye

So oružje sounds approximately like o-ru-zhye.

The tricky part for English speakers is usually žj in the middle. Try not to separate it too much; say it smoothly.

Usually, yes: stan commonly means apartment or flat.

In many contexts, u stanu is best translated as:

• in the apartment
• in the flat

Which one sounds better depends on whether you are using American English (apartment) or British English (flat).

In standard Croatian, if you want a full sentence meaning The weapon is in the apartment, you normally need je:

• Oružje je u stanu.

Without je, Oružje u stanu sounds incomplete as a normal statement. In headlines, labels, notes, or very compressed speech, you might see something like that, but it is not the regular full-sentence form.

The dictionary form is stan.

When you learn Croatian nouns, they are normally listed in the nominative singular:

• stan = apartment

Then the ending changes depending on case:

• stan = nominative
• stana = genitive
• stanu = dative/locative
• stanom = instrumental

So when you see stanu, it is useful to mentally connect it back to the base form stan.