Vojska ima veliki kamion.

• vojska = army; this is the subject
• ima = has; this is the verb
• veliki = big/large; this describes kamion
• kamion = truck; this is the direct object

So the structure is:

subject + verb + object

= The army has a big truck.

Because vojska is the subject of the sentence, and subjects normally appear in the nominative case in Croatian.

The basic dictionary form of the noun is vojska, and that is also the nominative singular form.

Ima is the 3rd person singular present tense of the verb imati (to have).

Here is the present tense of imati:

• ja imam = I have
• ti imaš = you have
• on/ona/ono ima = he/she/it has

Since vojska is grammatically singular, Croatian uses ima = has.

The adjective has to agree with the noun it describes.

kamion is:

• masculine
• singular
• here in the accusative case

For an inanimate masculine singular noun in the accusative, the form is the same as the nominative. So:

• veliki kamion = a big truck

Why not the other forms?

• velika is feminine, so it would not match kamion
• velik does exist as a shorter form in some contexts, but veliki is the normal form learners should use here

It is in the accusative case, because it is the direct object of ima.

However, for masculine inanimate singular nouns, the accusative is usually the same as the nominative. So:

• nominative: kamion
• accusative: kamion

That is why you do not see a change here.

Because kamion is masculine inanimate singular.

In Croatian:

• masculine animate accusative often looks like the genitive
• masculine inanimate accusative usually looks like the nominative

Since a truck is not animate, you get:

• veliki kamion = correct

Compare:

• vidim velikog psa = I see a big dog
• vidim veliki kamion = I see a big truck

So the adjective follows the same animate/inanimate pattern as the noun.

Croatian has no articles like English a/an/the.

So kamion by itself can mean:

• a truck
• the truck

Which meaning is intended depends on context.

In an isolated example like this, English usually translates it as a big truck.

Yes. Croatian word order is more flexible than English because case endings help show grammatical roles.

The neutral order here is:

Vojska ima veliki kamion.

But other orders are possible, for example:

• Veliki kamion ima vojska.
• Ima vojska veliki kamion.

These can sound marked, literary, or focused differently depending on context. For beginners, the safest choice is the neutral order:

subject + verb + object

In this sentence, vojska is singular.

Many feminine singular nouns in Croatian end in -a.
So vojska is a feminine singular noun meaning army.

Its plural is vojske.

That is also why the verb is singular:

• vojska ima = the army has
• vojske imaju = the armies have

Vojska is feminine.

It matters mainly for agreement in other situations, especially with:

• adjectives
• past tense forms
• pronouns

In this sentence, the main visible effect is the verb choice through singular agreement:

• vojska ima

If you added an adjective to vojska, it would have to be feminine, for example:

• velika vojska = a big army

A simple approximate pronunciation is:

ka-mee-on

More roughly:

• ka as in father
• mi like mee
• on with a clear short o

Croatian usually pronounces words quite consistently, and each vowel is clearly heard.
So kamion has three syllables: ka-mi-on.

You may sometimes encounter shorter adjective forms like velik, especially in certain styles or fixed usage, but for a learner the safest and most standard form here is:

Vojska ima veliki kamion.

So in ordinary beginner usage, prefer veliki.

You make it negative by using nema:

Vojska nema veliki kamion.
= The army does not have a big truck.

Learners should note that Croatian often uses the genitive after negation in many contexts, so you may also encounter:

Vojska nema velikog kamiona.

That is a more advanced point, but it is good to know that negation can affect case choice.

A simple yes/no question is:

Ima li vojska veliki kamion?
= Does the army have a big truck?

Another very common spoken pattern is just to use rising intonation:

Vojska ima veliki kamion?

But Ima li... is the clearer standard pattern for learners.

The dictionary forms are:

• vojska = army
• imati = to have
• velik or commonly listed as velik / veliki = big, large
• kamion = truck

In actual sentences, words change form depending on:

• case
• number
• gender
• person
• tense

So the sentence uses:

• vojska as nominative singular
• ima as 3rd person singular present
• veliki kamion as masculine singular accusative inanimate