هذا الخطر حقيقي.

A fully vocalized version is:

هٰذا الخَطَرُ حَقيقِيٌّ

A simple learner-friendly pronunciation is:

hādhā al-khaṭar ḥaqīqī

A more careful full reading, including case endings, is:

hādhā al-khaṭaru ḥaqīqiyyun

A few sound notes:

• ذ in هذا sounds like th in this
• خ in الخطر is a throaty sound, like ch in German Bach or Scottish loch
• ح in حقيقي is a stronger, breathier h than English h

Because Arabic usually does not use a present-tense verb meaning is/are in simple sentences like this.

So:

• هذا الخطر حقيقي = This danger is real

There is no separate word for is in the present tense.

But in the past or other tenses, Arabic does use a verb such as كان:

• كان هذا الخطر حقيقيًّا = This danger was real

هذا means this for a masculine singular noun.

In Modern Standard Arabic, the normal pattern is:

• هذا + definite noun

So:

• هذا الخطر = this danger

Putting هذا before the noun is the standard MSA order.

In MSA, when a demonstrative like هذا comes before a noun, that noun is usually definite, so it normally takes الـ.

So the standard phrase is:

• هذا الخطر = this danger

This may feel strange to an English speaker, because it looks literally like this the-danger, but that is just how standard Arabic forms it.

By contrast:

• هذا خطرٌ حقيقيٌّ means This is a real danger

That is a different structure.

Because حقيقي here is not an adjective inside the noun phrase. It is the predicate of the sentence.

So:

• هذا الخطر حقيقي = This danger is real

Here, حقيقي means real as the thing being said about this danger, so it is normally indefinite.

Compare that with:

• الخطر الحقيقي = the real danger

In that phrase, حقيقي is directly describing الخطر, so it must match it in definiteness:

• الخطر = definite
• الحقيقي = also definite

This is a very important distinction:

• الخطر حقيقي = The danger is real
• الخطر الحقيقي = The real danger

It is an adjective in meaning, but in this sentence it functions as the predicate of a nominal sentence.

A simple way to understand the sentence is:

• هذا الخطر = the subject phrase
• حقيقي = what is being said about it

So grammatically, it is not just an adjective attached to the noun the way real danger works in English. It is more like:

• This danger — real

which English translates as:

• This danger is real

Yes. They match الخطر in gender and number.

الخطر is:

• masculine
• singular

So Arabic uses:

• هذا = masculine singular this
• حقيقي = masculine singular real

If the noun were feminine, the forms would change. For example:

• هذه المشكلة حقيقية = This problem is real

So agreement matters.

A practical beginner explanation is:

• هذا الخطر = the subject/topic, this danger
• حقيقي = the predicate/comment, real

A more traditional grammar explanation is that:

• هذا is the demonstrative
• الخطر is the noun identified by the demonstrative
• together they function as the مبتدأ part of the sentence
• حقيقي is the خبر

If you are a beginner, the simplest useful understanding is just:

• this danger
  • is real

The fully vowelled sentence is:

هٰذا الخَطَرُ حَقيقِيٌّ

The endings are:

• الخطرُ with -u because it is in the nominative
• حقيقيٌّ with -un because it is also nominative as the predicate

A few notes:

• هذا does not show a normal case ending in the same way
• In ordinary Arabic writing, these short vowels are usually omitted
• In normal pause, speakers often do not pronounce the final case endings clearly

So learners usually first meet it as:

هذا الخطر حقيقي

They are similar, but not the same.

هذا الخطر حقيقي

• This danger is real

Here, الخطر is definite: the danger / this danger And حقيقي is the predicate: is real

هذا خطر حقيقي

• This is a real danger

Here, خطر is indefinite: a danger And حقيقي describes خطر inside the noun phrase: a real danger

So the first sentence talks about a specific danger and says it is real. The second identifies something as being a real danger.

In standard MSA, هذا الخطر حقيقي is the normal form.

الخطر هذا is common in many spoken dialects, but it is not the usual MSA pattern for beginners to copy.

So for Modern Standard Arabic, use:

• هذا الخطر حقيقي

That is the safest and most standard choice.