Acuan itu besar.

The structure is:

• acuan = the noun, the thing being talked about
• itu = that, or sometimes a marker that makes the noun definite, like the
• besar = big / large

So the sentence is literally:

• mold/template that big

But in natural English, it means:

• That mold is big
• or sometimes The mold is big, depending on context

A very common Malay sentence pattern is:

• noun + adjective

with no separate word for is.

Malay often leaves out the verb to be when linking a subject to an adjective or noun.

So instead of saying:

• Acuan itu is big

Malay simply says:

• Acuan itu besar

This is completely normal. In Malay, adjectives can act like predicates by themselves.

Other examples:

• Rumah itu besar = That house is big
• Bilik ini kecil = This room is small

So if an English speaker feels something is missing, it is not actually missing in Malay grammar.

Itu usually means that.

So acuan itu can mean:

• that mold
• that template
• that mould, depending on the variety of English and context

However, in real Malay, itu can also help make the noun feel definite, so sometimes it is translated more naturally as the rather than that.

So depending on context, Acuan itu besar could be understood as:

• That mold is big
• The mold is big

This is one reason direct word-for-word translation does not always sound natural.

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

So:

• acuan itu = that mold
• rumah ini = this house

This is different from English, where this and that come before the noun.

Compare:

• English: that mold
• Malay: acuan itu

This is a very common pattern, so it is worth memorizing early.

Yes, besar is an adjective meaning big or large.

It comes at the end because it is functioning as the predicate of the sentence:

• Acuan itu besar = That mold is big

Malay often uses this pattern:

• subject + adjective

Compare:

• Kereta itu mahal = That car is expensive
• Anak itu pandai = That child is clever

So besar is not directly modifying acuan inside a noun phrase here. It is telling us something about acuan itu.

This is an important difference.

• acuan besar = a big mold / big mold
  Here, besar directly describes the noun.

• acuan itu besar = that mold is big
  Here, besar is the main description in a full sentence.

So:

• acuan besar = noun phrase
• acuan itu besar = full sentence

You can think of it like this:

• acuan besar answers what kind of mold?
• acuan itu besar answers what is that mold like?

Yes. In many contexts, acuan itu may be translated naturally as the mold.

Although itu literally means that, Malay often uses ini and itu in ways that overlap with definiteness. So the most natural English translation depends on context.

For example, if you are already talking about a particular mold, Acuan itu besar may sound more natural in English as:

• The mold is big

If you are contrasting it with another one, then:

• That mold is big

may fit better.

So the literal meaning and the natural translation are not always identical.

Not if you want the same meaning.

Acuan itu besar means:

• That mold is big

But Itu acuan besar would be understood differently, more like:

• That is a big mold
• or That is a large mold

So the word order changes the structure and meaning.

Compare:

• Acuan itu besar = the mold is big
• Itu acuan besar = that is a big mold

This is a very useful contrast to notice.

You would usually use tidak before the adjective:

• Acuan itu tidak besar = That mold is not big

In Malay:

• tidak is used to negate verbs and adjectives
• bukan is usually used to negate nouns or noun phrases

So here, because besar is an adjective, tidak is the correct choice.

In everyday Malay, you can often just use rising intonation:

• Acuan itu besar? = Is that mold big?

A more formal or explicit version is:

• Adakah acuan itu besar?

Both are possible, but the plain intonation question is very common in speech.

So the statement and question can look almost the same in writing unless a question marker or punctuation is added.

Acuan can mean things like:

• mold
• mould
• template
• pattern
• cast

The exact English word depends on context.

For example, in manufacturing it may mean mold. In design or formatting, it may feel more like template or pattern.

So even if the sentence structure is simple, the best English meaning of acuan may change depending on the situation.

A learner-friendly pronunciation is roughly:

• ah-CHOO-an

A few helpful points:

• c in Malay is pronounced like English ch
• u is usually like oo in food
• the word has three syllables: a-cu-an

So acuan is not pronounced with an English k sound at the beginning of c.

If you replace itu with ini, you get:

• Acuan ini besar

This means:

• This mold is big
• or sometimes This template is big, depending on context

So:

• ini = this
• itu = that

Both usually come after the noun:

• acuan ini = this mold
• acuan itu = that mold

This is a very common and useful pair to learn together.