Jangan bertindak demikian.

Jangan is the normal Malay word used to make a negative command: don’t ...

So when jangan comes before a verb, it tells someone not to do that action.

In this sentence:

• jangan = don’t
• bertindak = act / take action
• demikian = like that / in that manner

So jangan is the key word that turns the sentence into a prohibition or warning.

In Malay, commands often leave out the subject if it is obvious. English usually says Don’t do that, without needing you, and Malay works similarly.

So:

• Jangan bertindak demikian. is a complete sentence.
• The listener is understood from the context.

If you really want to include the person, you can, but it is often unnecessary. Leaving it out sounds natural.

Bertindak means to act, to take action, or sometimes to behave, depending on context.

It is broader than just physical movement. It can refer to:

• the way someone behaves
• the way someone responds
• the action someone chooses to take

In this sentence, it suggests something like don’t behave that way or don’t act like that.

Bertindak is built from the root tindak plus the prefix ber-.

The prefix ber- often forms verbs that mean things like:

• doing an action
• having or using something
• being engaged in something

With tindak, the form bertindak means to act or to take action.

For a learner, the simplest way to remember it is:

• tindak = root related to action/steps
• bertindak = to act

You do not need to translate the prefix separately every time, but it is useful to recognize that ber- is a very common verb-forming prefix in Malay.

Demikian means like that, in that way, or thus.

In this sentence, it means in that manner.

However, demikian sounds fairly formal or written. It is common in:

• formal speech
• announcements
• official writing
• books
• news-style language

In everyday conversation, many speakers would more naturally say:

• Jangan bertindak begitu.
• Jangan buat macam itu.

So demikian is correct, but it has a more formal tone than some everyday alternatives.

It sounds fairly formal because of demikian.

The structure itself is perfectly normal, but the choice of demikian gives it a more polished or official feeling. A native speaker might use it in:

• serious advice
• formal warnings
• written instructions
• official or literary contexts

A more casual version would usually use begitu or macam itu instead of demikian.

In Malay, words describing the manner of an action often come after the verb.

So the pattern here is:

• jangan
  • verb + manner word

That gives:

• jangan = don’t
• bertindak = act
• demikian = like that / in that way

This word order is natural in Malay. English also often puts this kind of expression after the verb: Don’t act like that.

Yes. Jangan bertindak begitu is a very natural alternative.

The difference is mainly tone:

• demikian = more formal, written, or serious
• begitu = more common in everyday speech

Both are correct. If you are speaking casually, begitu will often sound more natural.

Yes, it is a direct negative command. It can sound firm, especially depending on tone of voice.

It is not automatically rude, but it is definitely a clear instruction or warning.

If you want to soften it, Malay often uses extra words or a gentler tone, for example:

• Tolong jangan bertindak demikian. = please don’t act that way
• Janganlah bertindak demikian. = a softer or more persuasive don’t

So the plain form is direct; added particles or polite words can make it less harsh.

Yes. In this sentence, English could naturally interpret it as either:

• don’t act like that
• don’t behave that way

That is because bertindak can refer both to:

• outward behavior
• a chosen course of action

The exact nuance depends on context. If someone is speaking about manners, it may feel closer to behave. If they are talking about someone’s response or decision, it may feel closer to act.

Not really, and it sounds less natural.

Melakukan means to do / to carry out, but it usually expects a clearer object, such as:

• melakukan kesalahan = commit a mistake/offense
• melakukan tugas = carry out a task

With demikian, melakukan demikian is possible in some contexts, but it sounds more awkward and less idiomatic here than bertindak demikian.

If the idea is about someone’s way of behaving or reacting, bertindak is the better choice.

A simple learner-friendly breakdown is:

• Jangan → jan-gan
• bertindak → ber-tin-dak
• demikian → de-mi-ki-an

A few helpful notes:

• ng in jangan is like the ng sound in sing
• ber- is often pronounced lightly; in careful speech you will hear the r
• demikian has four syllables: de-mi-ki-an

If you say it smoothly, it sounds roughly like:

jan-gan ber-tin-dak de-mi-ki-an

Yes. Jangan bertindak demikian. is fully complete.

Malay does not need articles like the or a, and it often omits the subject in commands. Because of that, short sentences like this are very common and perfectly grammatical.

So even though it is only three words, it works as a full sentence.