Perniagaan ini termasuk peruncitan.

In Malay, demonstratives like ini (this) and itu (that) usually come after the noun.

So:

• perniagaan ini = this business
• syarikat itu = that company

This is different from English, where this comes before the noun.

Perniagaan usually means business, trade, or commercial activity. It can also refer to a business enterprise in a general sense.

If you specifically mean a company as an organization or legal entity, Malay often uses syarikat instead.

So perniagaan ini is more like this business than this company, although context matters.

Termasuk commonly means:

• includes
• is included in
• falls under

The exact English wording depends on context.

So this sentence could mean something like:

• This business includes retailing or
• This business falls under retailing

If the broader context is about business categories, the second idea is often the better fit.

Masuk by itself usually means enter, go in, or come in.

Termasuk is a different word in meaning: it often means to be included, to come under, or to count as part of.

So although the two words are related, you should learn termasuk as its own very common vocabulary item. In this sentence, masuk would not work.

Peruncitan means retailing or the retail sector.

It is related to runcit, which has the idea of retail or small-scale sale rather than wholesale.

So:

• runcit = retail
• peruncitan = retailing / retail trade / the retail sector

In business language, peruncitan is a standard and fairly formal word.

It is built from the root runcit using a noun-forming pattern that creates the sense of the field, activity, or process.

So peruncitan is not just retail as an adjective-like idea; it refers more to retailing as a business activity or sector.

English speakers do not need to master the morphology right away, but it helps to notice this pattern because many Malay nouns are built in similar ways.

No. Malay often does not use a word equivalent to English is/are in ordinary sentences.

So Perniagaan ini termasuk peruncitan is already complete.

Adding adalah here would usually sound unnecessary or overly formal. A learner should normally just use the sentence without it.

Malay does not normally use articles the way English does.

So a Malay noun often appears without any separate word for a/an/the. Context tells you which English article makes sense.

For example:

• perniagaan could mean a business, the business, or just business
• perniagaan ini clearly means this business, so no article is needed

It can, especially if you want to make the idea of belonging to a category clearer.

• Perniagaan ini termasuk peruncitan can sound like This business includes retailing
• Perniagaan ini termasuk dalam peruncitan more clearly suggests This business falls under the retail category

So if the intended meaning is classification, adding dalam can reduce ambiguity.

It sounds neutral to somewhat formal. It is the kind of wording you might see in:

• business descriptions
• registration forms
• reports
• official classifications

In casual speech, people might use alternatives such as:

• Bisnes ini dalam bidang runcit
• Ini bisnes runcit

Those are more conversational, while Perniagaan ini termasuk peruncitan sounds more standard or administrative.

You can change it, but the focus changes.

For example:

• Peruncitan termasuk dalam perniagaan ini = Retailing is included in this business

That is grammatical, but now peruncitan is the topic.

However, for this business, you should still say perniagaan ini, not ini perniagaan, in normal usage. So the position of ini is important.