Zgodan muškarac koristi trik.

Because muškarac is the subject of the sentence, so it is in the nominative case.

• Zgodan muškarac = a handsome man / the handsome man
• He is the one doing the action.

You would see muškarca in other cases, for example as a direct object:

• Vidim zgodnog muškarca. = I see a handsome man.

So in Zgodan muškarac koristi trik, the nominative muškarac is correct.

Zgodan is an adjective meaning handsome, and it must agree with the noun it describes in:

• gender
• number
• case

Here, muškarac is:

• masculine
• singular
• nominative

So the adjective must also be masculine singular nominative:

• zgodan muškarac

Compare:

• zgodna žena = a handsome / attractive woman
• zgodno dijete = a cute child
• zgodni muškarci = handsome men

Not always. Zgodan can mean several things depending on context, including:

• handsome / attractive
• nice-looking
• sometimes convenient or suitable, in other contexts

In this sentence, with muškarac, it most naturally means handsome or good-looking:

• zgodan muškarac = a handsome man

So learners should remember that zgodan is a flexible adjective whose exact meaning depends on the noun and situation.

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

So:

• muškarac can mean a man or the man
• trik can mean a trick or the trick

Which one is intended depends on context.

So Zgodan muškarac koristi trik could mean:

• A handsome man uses a trick
• The handsome man uses the trick

without changing the Croatian sentence.

Trik is the direct object, so it is in the accusative case. But for many masculine inanimate nouns, the accusative singular is the same as the nominative singular.

So:

• nominative: trik
• accusative: trik

That is why it looks unchanged.

Compare this with a masculine animate noun, where accusative usually changes:

• muškarac (nom.)
• muškarca (acc.)

Example:

• Vidim muškarca. = I see a man.

But:

• Koristi trik. = He uses a trick.

Koristi is the 3rd person singular present tense form of the verb koristiti = to use.

So:

• ja koristim = I use
• ti koristiš = you use
• on/ona/ono koristi = he/she/it uses

In this sentence:

• Zgodan muškarac koristi trik.
• A handsome man uses a trick.

The subject muškarac is singular, so the verb is also singular: koristi.

Koristiti is usually imperfective.

That means it describes:

• a general action
• a repeated action
• an ongoing action
• a simple present statement

So koristi here means something like:

• uses
• is using
• does use

depending on context.

If you want to talk about a completed single act of using something, Croatian may use a perfective partner in some contexts, but koristiti itself is the normal basic verb for to use.

Yes, Croatian word order is more flexible than English, but changing it can change the focus or make the sentence sound less neutral.

The most neutral version here is:

• Zgodan muškarac koristi trik.

Other possibilities:

• Muškarac koristi trik. = The man uses a trick.
• Trik koristi zgodan muškarac. = It is the handsome man who uses the trick / A trick is used by a handsome man.
  This sounds marked and gives extra emphasis to trik or the subject position at the end.
• Zgodan muškarac trik koristi. = also possible, but stylistically marked or poetic/emphatic.

So yes, word order can change, but the original sentence is the most straightforward.

A rough pronunciation guide:

• muškarac ≈ MOO-shka-rats
• koristi ≈ KO-ri-sti

A few useful sound notes:

• š sounds like sh in shoe
• c usually sounds like ts in cats
• Croatian pronunciation is generally more regular than English spelling

So:

• muškarac = moo-SHKA-rats
• trik = like English treek but shorter and crisper
• zgodan begins with zg-, which may feel unusual to English speakers, but both consonants are pronounced

Trik is a common Croatian noun meaning trick, and it is a loanword ultimately related to the same international word found in many European languages.

For a learner, the important thing is that it behaves like a regular Croatian masculine noun:

• nominative singular: trik
• genitive singular: trika
• accusative singular: trik

So it is easy to recognize and useful in everyday language.

Usually, with muškarac, zgodan refers to physical attractiveness, so handsome or good-looking is the best interpretation.

If you want to say nice in the sense of personality, Croatian would more naturally use words like:

• drag = kind, dear
• ljubazan = polite, kind
• simpatičan = pleasant, likeable

So:

• zgodan muškarac = handsome man
• drag muškarac or ljubazan muškarac would point more toward character, depending on context

Plural forms would be:

• Zgodni muškarci koriste trik. = Handsome men use a trick / the trick

Changes:

• zgodan → zgodni
• muškarac → muškarci
• koristi → koriste

So the verb changes to match the plural subject.

A good first clue is that trik ends in a consonant, and nouns ending in a consonant are often masculine in Croatian.

Also, dictionary entries usually give the noun in nominative singular, and you learn its gender with it:

• trik = masculine
• muškarac = masculine

You can also see masculine agreement in adjectives and other forms in larger contexts, but for beginners, memorizing the noun together with its gender is the best approach.