Pelupusan sisa itu penting.

Malay often leaves out the verb to be in simple statements like this.

So instead of saying something like Waste disposal is important, Malay can simply say:

Pelupusan sisa itu penting
literally: That waste disposal important

This is completely normal. The meaning of is is understood from the structure.

You may sometimes see adalah in more formal writing:

Pelupusan sisa itu adalah penting

That is possible, but in many everyday sentences it is more natural to leave it out.

Itu usually means that, but in many contexts it can also work like the, referring to something already known or already mentioned.

In this sentence:

sisa itu = that waste / the waste

A key thing for English speakers is that itu comes after the noun, not before it.

• rumah itu = that house / the house
• buku itu = that book / the book

So sisa itu is not unusual at all; it follows normal Malay word order.

In Malay, the main noun usually comes first, and the describing noun comes after it.

So:

• pelupusan sisa = disposal of waste / waste disposal

The head noun is pelupusan (disposal), and sisa tells you what is being disposed of.

This is different from English, where noun modifiers often come before the main noun:

• English: waste disposal
• Malay: pelupusan sisa

A useful way to think about it is:

pelupusan sisa = disposal [of] waste

Pelupusan is a derived noun meaning disposal.

It comes from the verb melupuskan, which means to dispose of, to eliminate, or to get rid of, depending on context.

Malay often forms nouns with patterns like pe-...-an or related forms. So a verb can become a noun referring to the act or process.

Very roughly:

• melupuskan = to dispose of
• pelupusan = disposal

So in this sentence, pelupusan names the process or act, not the action as a verb.

Malay nouns usually do not have to show singular or plural the way English does.

So sisa can mean:

• waste
• a residue
• leftovers
• waste materials

The exact meaning depends on context.

In pelupusan sisa, English naturally translates it as waste disposal, and there is no need for Malay to mark whether the waste is singular or plural.

If Malay speakers want to make plurality very explicit, they can sometimes use reduplication, but that is not necessary here.

Because penting is the predicate of the sentence: it tells you something about pelupusan sisa itu.

Malay often uses this pattern:

[topic/subject] + [description]

So here:

• Pelupusan sisa itu = the subject/topic
• penting = important

That gives:

Pelupusan sisa itu penting
= That waste disposal is important / Waste disposal is important

This is very natural word order in Malay.

Yes, you can, but the meaning changes slightly.

• Pelupusan sisa itu penting = That/the waste disposal is important
• Pelupusan sisa penting = Waste disposal is important

Without itu, the sentence sounds more general.

With itu, it usually points to something specific, already known, or previously mentioned.

So if you are talking about waste disposal in general, leaving out itu may be better. If you mean a particular case or the waste disposal being discussed, itu fits well.

Yes, that is grammatically possible, especially in formal or written Malay.

However, many Malay sentences do not need adalah, and using no copula is often more natural:

• more natural/common: Pelupusan sisa itu penting
• more formal/emphatic: Pelupusan sisa itu adalah penting

So as a learner, it is safest to know that the shorter version is perfectly correct and very common.

A simple approximate pronunciation is:

peh-loo-poo-san

More roughly by syllable:

pe-lu-pu-san

A few notes for English speakers:

• Malay vowels are usually pronounced clearly and consistently.
• u sounds like oo in food
• e in pe is often a light schwa-like sound, similar to the a in about

So the whole sentence is approximately:

peh-loo-poo-san see-sah ee-too pen-ting

That is only an approximation, but it is a useful starting point.

Yes, it sounds fairly neutral to formal, especially because pelupusan is a somewhat formal noun.

In casual speech, people might choose simpler wording depending on the context, but this sentence is completely normal, especially in education, government, environmental discussions, or news language.

So if you see it in a textbook, article, sign, or public-information context, that would be very natural.