Malaikat itu baik.

In Malay, you often do not need a verb like is in simple sentences where a noun is linked to an adjective.

So:

• Malaikat itu baik = The/That angel is good

Malay commonly uses a zero copula here, meaning the linking verb is simply left out.

You will see the same pattern in many basic sentences:

• Rumah itu besar = The house is big
• Dia sibuk = He/She is busy
• Mereka gembira = They are happy

So this sentence is completely normal without any word for is.

Itu usually means that, but after a noun it often works like a marker of specificity, so it can be understood as that or the, depending on context.

In Malaikat itu baik:

• malaikat = angel
• itu = that / the
• baik = good / kind

So the phrase malaikat itu can mean:

• that angel
• the angel

A useful thing to remember is that Malay often places itu after the noun:

• rumah itu = that house / the house
• orang itu = that person / the person
• malaikat itu = that angel / the angel

That is just the normal Malay pattern for demonstratives like ini and itu.

Malay says:

• buku ini = this book
• buku itu = that book

not usually:

• ini buku
• itu buku

when you mean this book or that book as a noun phrase.

So malaikat itu follows the standard Malay order:

• noun + itu

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

Yes. In many contexts, malaikat itu can be interpreted as either the angel or that angel.

Malay does not have a separate word exactly like the English article the, so itu often helps mark something as specific.

Which English translation is best depends on context:

• if you are pointing one out, that angel
• if the angel has already been mentioned, the angel

So the Malay sentence itself is natural either way.

Baik is usually an adjective meaning things like:

• good
• kind
• nice
• well-behaved

In Malaikat itu baik, it describes malaikat itu, so it functions as an adjective: the angel is good/kind.

Depending on context, baik can also appear in other uses, but here the simplest understanding is just good or kind.

No. Malay adjectives do not change to match gender or number.

So baik stays baik whether the noun is singular, plural, male, female, or non-human.

Examples:

• Malaikat itu baik = The angel is good
• Malaikat-malaikat itu baik = The angels are good
• Perempuan itu baik = The woman is good
• Lelaki itu baik = The man is good

Unlike in some languages, there is no adjective agreement here.

Yes, but it changes the feel of the sentence.

Malaikat itu baik refers to a specific angel:

• the angel or that angel

Malaikat baik is less specific. Depending on context, it could sound like:

• angels are good
• an angel is good
• angelic beings are good

So if you mean one particular angel, itu is helpful and often preferred.

A common way to make it clearly plural is to reduplicate the noun:

• Malaikat-malaikat itu baik = The angels / those angels are good

Reduplication is a standard Malay way to mark plural nouns.

However, in real Malay, plurality is often understood from context, so speakers do not always have to repeat the noun unless they want to be explicit.

Malaikat itu baik is a normal, neutral, standard Malay sentence.

In casual speech, especially in conversation, itu is often pronounced or written as tu:

• Malaikat tu baik

But the full form itu is the standard one and is the best form for learners to know first.

It is commonly pronounced roughly as:

• ma-lai-kat

with four syllables:

• ma
• lai
• kat

And baik is roughly:

• ba-ik

with two syllables.

A rough English-style guide would be:

• malaikat ≈ mah-LIE-kaht
• baik ≈ bah-eek

But it is better to think in clear syllables rather than forcing an English stress pattern onto Malay, because Malay stress is usually softer and less dramatic than in English.

That would usually sound unnatural here.

The word adalah is not a general replacement for English is. In standard Malay, adalah is mainly used in more formal or explanatory sentences, especially before noun phrases, not usually before plain adjectives like baik.

So for a simple sentence like this, the natural form is:

• Malaikat itu baik

not:

• Malaikat itu adalah baik

For learners, the safest rule is: in basic adjective sentences, just leave out is.