Szeretné, ha elbújnánk, ugyanis az ünnepelt hamarosan érkezik.

It is the verb szeret in the 3rd person singular conditional definite form.

So szeretné means roughly:

• he/she would like it
• or you would like it in formal address

It is not simple present likes. That would be szereti if there were a definite object, or szeret without one.

The ending -né tells you two things at once:

• conditional: would like
• definite conjugation: there is a specific understood object

In this sentence, that understood object is the whole following idea: ha elbújnánk.

Yes, you can think of the sentence as containing an implied azt:

(Azt) szeretné, ha elbújnánk.

Literally, that is something like:

He/she would like that, if we hid or more naturally, He/she would like us to hide

Hungarian often leaves out azt when the following clause already makes the meaning clear. Including it is possible, but omitting it is very common and natural.

Yes, ha usually means if, but in the pattern szeretné, ha... it works a bit differently.

This is a very common Hungarian structure meaning:

• would like it if...
• would like someone to...

So:

Szeretné, ha elbújnánk
literally = He/she would like it if we hid
natural English = He/she wants us to hide

So even though ha still looks like if, the whole pattern functions as a standard way to express a wish or preference.

The ending -nánk is the 1st person plural conditional ending, so it means:

• we would ...

So:

• elbújnánk = we would hide

This happens because after szeretné, ha..., Hungarian normally uses a conditional verb form in the subordinate clause.

So even though English says wants us to hide, Hungarian says something closer to:

would like it if we would hide

That sounds odd in English, but it is normal Hungarian grammar.

Because ha elbújnánk belongs to the fixed wish/preference pattern after szeretné.

Compare the difference:

• Szeretné, ha elbújnánk = He/she would like us to hide
• Ha elbújunk... = If we hide...

So elbújunk would create a real conditional meaning, not the desired would like us to hide structure.

The base verb is bújni, which has meanings related to hiding, creeping, or crawling into somewhere depending on context.

With the prefix el-, it becomes elbújni, which very commonly means:

• to hide oneself
• to hide away
• to go out of sight

In this sentence, elbújnánk is the natural verb for we hide / we go hide.

The prefix often gives the action a more complete, result-oriented feeling: not just the idea of hiding, but actually getting hidden.

From the verb form alone, it could be any of these:

• he would like
• she would like
• you would like (formal singular)

Hungarian usually drops subject pronouns when they are clear from context, and Hungarian verbs do not show gender.

So szeretné does not tell you whether the person is male or female. Only the surrounding context does that.

Ünnepelt comes from the verb ünnepel = to celebrate.

As a noun/adjective here, az ünnepelt means:

• the celebrated person
• the person being honored
• depending on context, the birthday person, the guest of honor, or the celebrant

So it is not just any person at the event; it is specifically the person for whom the celebration is happening.

The article az means the, so this is a specific, already-known person.

Ugyanis means something like:

• because
• for
• after all
• you see

It introduces an explanation for what was just said.

So here:

Szeretné, ha elbújnánk, ugyanis az ünnepelt hamarosan érkezik.
= He/she wants us to hide, because the celebrant is arriving soon.

Compared with mert:

• mert is the more basic, direct because
• ugyanis sounds a bit more explanatory, like you see or the reason is that

Both can often be translated as because, but ugyanis is a little more discourse-oriented and explanatory.

Hungarian word order is flexible, but it is not random. It depends a lot on topic and focus.

In:

az ünnepelt hamarosan érkezik

• az ünnepelt is the topic: we are talking about the celebrant
• hamarosan érkezik is what is being said about that person: is arriving soon

This is a very natural, neutral order.

Also:

• hamarosan = soon
• placing it before érkezik is normal and natural

Other word orders are possible, but they can shift emphasis.

Yes. Hamarosan means:

• soon
• shortly
• before long

So:

az ünnepelt hamarosan érkezik
= the celebrant will arrive soon
or
= the celebrant is arriving shortly

It is a very common adverb and often appears before the verb.