Hadirin terbahak-bahak bersama.

Hadirin is a formal word meaning the audience, the attendees, or those present. You often hear it in speeches, ceremonies, announcements, and formal writing.

A very common phrase is Hadirin sekalian, meaning something like ladies and gentlemen / everyone present.

So yes, this sentence sounds more formal than everyday casual speech.

It refers to a group, so its meaning is plural or collective.

Malay does not always mark plural as clearly as English does. A noun can often stay in one form, and context tells you whether it means one person or more than one. In the case of hadirin, the word itself already normally refers to multiple people.

You may also hear para hadirin in formal speech. That is very common, even though hadirin already has a plural sense.

Terbahak-bahak means laughing loudly, roaring with laughter, or bursting out laughing.

It is much stronger than a basic word like ketawa or tertawa. It suggests big, open, hearty laughter rather than just a smile or a small laugh.

So the sentence gives the idea that the audience did not just laugh a little—they laughed loudly and openly.

This is an example of reduplication, which is very common in Malay.

In terbahak-bahak, the repeated form helps express a strong, repeated, or vivid action. It gives the sense of full, rolling laughter.

Also, in real usage, learners should treat terbahak-bahak as a fixed expression. The repeated form is the normal one here.

Usually, ter- can have meanings like:

• accidental or unintentional action
• a state that happens naturally
• sometimes a superlative sense

But in terbahak-bahak, it is best to learn the whole word as one expression. Here it gives the sense of laughing out spontaneously or uncontrollably.

So rather than analyzing it too literally, it is safest to understand terbahak-bahak as a set phrase meaning to burst into loud laughter.

Bersama means together or together with.

In this sentence, it shows that the audience laughed as a group, not one by one. So Hadirin terbahak-bahak bersama means the audience burst out laughing together.

That said, because hadirin already refers to a group, bersama adds emphasis more than essential meaning.

Bersama is understandable, but some speakers might prefer other forms depending on the exact meaning.

Possible alternatives:

• Hadirin terbahak-bahak.
  Simply means The audience burst out laughing.

• Hadirin terbahak-bahak bersama-sama.
  More explicitly The audience burst out laughing together.

• Hadirin terbahak-bahak beramai-ramai.
  Emphasizes that many people did it together.

So the given sentence is understandable, but bersama-sama or just leaving bersama out may sound more natural in some contexts.

Malay often leaves out things that English requires.

For example:

• There is usually no article like the or a
• The verb to be is often omitted in simple sentences
• Tense is usually understood from context rather than verb changes

So Hadirin terbahak-bahak bersama is a complete sentence in Malay even though a literal English translation might feel like it is missing words.

Yes. The word order is straightforward:

• Hadirin = subject
• terbahak-bahak = verb
• bersama = adverb-like element meaning together

So it follows a normal subject + verb + modifier pattern.

That is a very common structure in Malay.

Because hadirin is formal, everyday speech would usually use a different subject.

For example:

• Semua orang ketawa. = Everyone laughed.
• Penonton ketawa besar. = The audience laughed loudly.
• Semua orang terbahak-bahak. = Everyone burst out laughing.
• Orang ramai terbahak-bahak. = The crowd burst out laughing.

So the original sentence sounds more like narration, formal description, or event language than relaxed conversation.