Peringatan itu sangat jelas.

Peringatan means warning, reminder, or notice, depending on context. In this sentence, it means warning.

It comes from the root ingat, which means to remember. With the affixes per- and -an, it becomes a noun: peringatan.

Examples:

• peringatan bahaya = danger warning
• surat peringatan = warning letter
• peringatan hari kemerdekaan = commemoration of Independence Day

So the exact meaning depends on the situation, but here warning is the natural meaning.

In Indonesian, words like ini (this) and itu (that) usually come after the noun they describe.

So:

• peringatan itu = that warning
• buku ini = this book
• rumah itu = that house

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

So peringatan itu literally follows the Indonesian pattern:

• noun + itu

It can feel like that, but in many contexts it can also work a bit like the.

So:

• peringatan itu can mean that warning
• but depending on context, it may also be understood as the warning

This is common in Indonesian. Itu often points to something already known in the conversation, so English may translate it as either that or the, depending on what sounds most natural.

Sangat means very.

So:

• sangat jelas = very clear

It is a common and neutral intensifier. It is stronger than plain jelas, but it is not unusually dramatic.

Compare:

• jelas = clear
• sangat jelas = very clear
• terlalu jelas = too clear
• cukup jelas = quite clear / clear enough

Indonesian often leaves out the verb to be when describing something.

So:

• Peringatan itu sangat jelas. literally looks like
• That warning very clear.

But it naturally means:

• That warning is very clear.

This is completely normal in Indonesian.

More examples:

• Dia tinggi. = He/She is tall.
• Rumahnya besar. = His/Her house is big.
• Makanan ini enak. = This food is delicious.

You do not need to add a word for is here.

Here, jelas is an adjective, meaning clear.

In Peringatan itu sangat jelas, it describes the subject peringatan itu.

Indonesian adjectives can appear directly after the noun phrase when they function as the predicate:

• Peringatan itu jelas. = The warning is clear.

But if you want to say a clear warning inside a noun phrase, you usually use yang:

• peringatan yang jelas = a clear warning

That distinction is useful:

• Peringatan itu jelas. = That warning is clear.
• peringatan yang jelas = a clear warning

No, sangat jelas is the normal order.

In Indonesian, intensifiers like sangat usually come before the adjective:

• sangat jelas = very clear
• sangat besar = very big
• sangat penting = very important

So jelas sangat would sound unnatural in standard Indonesian.

A simple pronunciation guide is:

pe-ring-a-tan ee-too sah-ngat je-las

A few helpful notes:

• e in peringatan is often like a soft uh sound at first
• r is usually lightly rolled or tapped
• ng in sangat is like the sound in sing
• j in jelas sounds like English j in jam
• stress in Indonesian is usually not as strong or dramatic as in English

You do not need to force strong stress. A smooth, even rhythm sounds natural.

It sounds neutral and perfectly natural. It can fit both everyday speech and more formal writing.

Why?

• peringatan is a normal standard word
• sangat is neutral
• jelas is neutral
• the structure is standard Indonesian

So this sentence is not slangy, and it is not overly stiff either.

You would usually say:

peringatan yang sangat jelas

This is because yang is commonly used to connect a noun with a descriptive adjective phrase.

Compare:

• Peringatan itu sangat jelas. = That warning is very clear.
• peringatan yang sangat jelas = a very clear warning

This is an important difference:

• without yang, the phrase tends to read like a full statement
• with yang, it works more naturally as a noun phrase

Yes, but they are not always exact replacements.

Some related words are:

• jelas = clear
• tegas = firm / definite / clear-cut
• gamblang = very explicit / plainly stated
• nyata = obvious / evident / real

Examples:

• Peringatan itu sangat jelas. = the warning is easy to understand
• Peringatan itu sangat tegas. = the warning is very firm or strongly stated
• Peringatan itu sangat gamblang. = the warning is extremely explicit

So jelas is the safest and most general word for clear here.

You usually would not say it that way in standard Indonesian.

More natural options are:

• Peringatan itu sangat jelas. = That warning is very clear.
• Peringatan tersebut sangat jelas. = That warning is very clear. slightly more formal
• Sebuah peringatan sangat jelas. = A warning is very clear. possible, but context matters

If you remove itu, peringatan by itself can sound too bare in this sentence unless the context strongly supports it.

So Peringatan itu sangat jelas is the most natural standalone sentence.