Aktiviti perniagaan ini memerlukan pendaftaran perniagaan.

Ini means this.

In Malay, demonstratives like ini (this) and itu (that) usually come after the noun phrase, not before it as in English.

So:

• aktiviti perniagaan ini = this business activity
• literally: activity business this

That is normal Malay word order.

Aktiviti perniagaan means business activity or business activities in a general sense.

• aktiviti = activity
• perniagaan = business

Malay often combines nouns this way, where the second noun describes the first. So aktiviti perniagaan is a noun phrase meaning an activity related to business.

If you said only perniagaan, that would just mean business. The full phrase is more specific.

Memerlukan means requires or needs.

It comes from the root perlu, which means necessary or need in a general sense. With the prefix and suffix, it becomes a transitive verb:

• perlu = need / necessary
• memerlukan = to require / to need something

In this sentence, memerlukan takes an object:

• memerlukan pendaftaran perniagaan
• requires business registration

So this is a normal verb meaning that something needs something else.

Both can relate to necessity, but they work differently.

• perlu often means need to or it is necessary to
• memerlukan means require and is followed by a direct object

Compare:

• Aktiviti ini perlu didaftarkan.
  = This activity needs to be registered.

• Aktiviti ini memerlukan pendaftaran.
  = This activity requires registration.

So in your sentence, memerlukan is used because the sentence is structured around requiring something: pendaftaran perniagaan.

Pendaftaran means registration.

It is a noun formed from the verb mendaftar (to register). Malay often creates nouns with patterns like peN- ... -an, which can produce a meaning like the act/process/result of doing something.

Here is the rough relationship:

• daftar = register/list
• mendaftar = to register
• pendaftaran = registration

So pendaftaran perniagaan means business registration.

Because the two phrases describe two different things:

• aktiviti perniagaan = business activity
• pendaftaran perniagaan = business registration

Even though perniagaan appears twice, it is not strange. Each noun phrase needs to be clear on its own.

The sentence is saying:

• the business activity
• requires
• business registration

So the repetition helps specify both the activity and the type of registration.

No. Malay does not usually use articles the way English does.

So:

• aktiviti perniagaan ini can mean this business activity
• pendaftaran perniagaan can mean business registration or the registration of a business, depending on context

Malay relies heavily on context rather than articles.

Because Malay often does not need a verb like to be in the same way English does.

But in this sentence, the main verb is actually memerlukan (requires), so there is no need for is anyway.

The structure is simply:

• Aktiviti perniagaan ini = subject
• memerlukan = verb
• pendaftaran perniagaan = object

So the sentence is complete without any extra word for is.

It is not specifically marked as singular or plural.

Malay nouns often do not change form for number. Whether something is singular or plural usually depends on context.

So perniagaan can mean:

• business
• businesses

In this sentence, English would most naturally translate it in the singular sense: business registration. But the Malay word itself does not force singular or plural.

That would sound unnatural.

Perlu usually does not connect directly to a noun object in that way. If you want to say requires business registration, memerlukan is the natural choice.

Good options include:

• Aktiviti perniagaan ini memerlukan pendaftaran perniagaan.
• Aktiviti perniagaan ini perlu didaftarkan.

But perlu pendaftaran perniagaan is not the best structure here.

Yes, it is understandable and natural, especially in formal or administrative contexts.

It sounds like the kind of sentence you might see in:

• official notices
• government websites
• registration guidelines
• business regulations

A native speaker might also say something slightly differently depending on context, for example:

• Aktiviti perniagaan ini perlu didaftarkan.
• Aktiviti ini memerlukan pendaftaran perniagaan.

But your original sentence is perfectly normal, especially in formal language.

A rough pronunciation guide is:

ak-ti-vi-ti per-nya-ga-an ee-nee muh-mer-loo-kan pen-daf-ta-ran per-nya-ga-an

A few useful notes:

• ng sounds like the ng in sing
• ny sounds like the ny in canyon
• Malay pronunciation is generally fairly regular compared with English

So perniagaan is roughly:

per-nya-ga-an

and pendaftaran is roughly:

pen-daf-ta-ran