Očito je bicikl ukraden.

Očito means obviously, evidently, or clearly.

In this sentence, the most natural English equivalent is:

• Obviously, the bicycle has been stolen.

The word comes from očit meaning obvious / evident. In real usage, očito often behaves like an adverb that comments on the whole sentence.

Because je is a clitic in Croatian.

Clitics are short, unstressed words that usually go in the second position of the clause, not necessarily where English is/has would go.

So:

• Očito je bicikl ukraden.

is normal because očito comes first, and je goes right after it.

You could also say:

• Bicikl je očito ukraden.

That is also correct, but the emphasis is a little different.

Croatian has no articles, so there is no separate word for a or the.

So bicikl can mean:

• a bicycle
• the bicycle

Which one is meant depends on context. In your sentence, English would usually use the bicycle because it sounds like a specific bicycle is being discussed.

Bicikl is in the nominative singular.

That is because it is the subject of the sentence.

Even though the bicycle is the thing affected by the action, in a passive structure the affected thing becomes the grammatical subject:

• Bicikl je ukraden. = The bicycle has been stolen.

If this were active, the bicycle would be in the accusative:

• Netko je ukrao bicikl. = Someone stole the bicycle.

So this is a very useful contrast for learners.

Ukraden is the past passive participle of the verb ukrasti meaning to steal.

With je, it forms a passive meaning:

• je ukraden = has been stolen / was stolen

It behaves a lot like an adjective in form, but here it is part of a passive verbal construction.

Related forms:

• ukraden bicikl = a stolen bicycle
• Bicikl je ukraden = The bicycle has been stolen

Because ukraden has to agree with bicikl.

Bicikl is:

• masculine
• singular
• nominative

So the participle must also be masculine singular nominative:

• bicikl → ukraden

Compare:

• knjiga je ukradena = the book has been stolen
  because knjiga is feminine

• pismo je ukradeno = the letter has been stolen
  because pismo is neuter

• bicikli su ukradeni = the bicycles have been stolen
  because bicikli is plural

This is a very common learner question, because Croatian and English do not match perfectly here.

Bicikl je ukraden can be translated in different ways depending on context:

• The bicycle has been stolen
• The bicycle was stolen
• sometimes The bicycle is stolen

But in most normal contexts, with ukrasti being a completed action, the best English translation is usually:

• has been stolen or
• was stolen

So the sentence usually refers to a completed theft, not just a general description.

Yes.

The structure is:

• je = form of biti meaning to be
• ukraden = passive participle

So the sentence is passive:

• Bicikl je ukraden. = The bicycle has been stolen.

The active version would be something like:

• Netko je ukrao bicikl. = Someone stole the bicycle.

Croatian uses both active and passive, but the passive is very natural here when the thief is unknown or unimportant.

Yes. Croatian word order is more flexible than English, though not completely free.

For example:

• Očito je bicikl ukraden.
• Bicikl je očito ukraden.

Both are correct.

The difference is mainly emphasis:

• Očito je bicikl ukraden puts obviously / evidently first
• Bicikl je očito ukraden starts with the bicycle

So the meaning stays basically the same, but the information focus shifts slightly.

Yes, absolutely.

That version means more explicitly:

• It is obvious that the bicycle has been stolen.

So you can compare:

• Očito je bicikl ukraden. = Obviously, the bicycle has been stolen.
• Očito je da je bicikl ukraden. = It is obvious that the bicycle has been stolen.

The version with da is more explicit and may feel easier to understand structurally for learners.

In practice, learners will often meet it as an adverb-like sentence word meaning obviously / evidently.

Historically and formally, it is related to the adjective očit meaning obvious. The form očito is the neuter singular form, but in sentences like this it functions very much like English obviously.

So the safest learner takeaway is:

• treat očito here as a word meaning obviously / evidently

That will help you understand and use the sentence correctly.