الضرر كبير.

A natural Egyptian pronunciation is eḍ-ḍarar kibīr.

A few notes:

• الضرر is pronounced eḍ-ḍarar, not el-darar.
• كبير is pronounced kibīr in Egyptian, often sounding like ki-BEER.
• The ḍ sound in ضرر is a heavy/emphatic d.

A rough stress pattern is:

• eḍ-ḍa-RAR ki-BIIR

In very simple learner spelling, you might see something like ed-darar kibeer, but that does not fully show the emphatic sound in ض.

Yes. This is a complete sentence.

In Egyptian Arabic, the present-tense verb to be is usually omitted in sentences like this. So Arabic says something literally like:

• the damage big

but the meaning is:

• the damage is big / serious

This kind of sentence is very common in Arabic.

If you want past or future, then you usually add a verb:

• الضرر كان كبير = The damage was big.
• الضرر هيبقى كبير = The damage will be big.

That is a very common and important question.

The key is definiteness:

• الضرر = the damage → definite
• كبير = big / serious → indefinite here

When Arabic has:

• a definite noun
  • an indefinite adjective-like word

it usually forms a sentence, not a noun phrase.

So:

• الضرر كبير = The damage is big/serious

But if you wanted the big damage, you would usually say:

• الضرر الكبير

There, both words are definite, so it becomes a noun phrase:

• the big damage

Because ض is a sun letter.

In Arabic, when ال comes before a sun letter, the l sound assimilates into the next consonant. So:

• written: الضرر
• pronounced: eḍ-ḍarar

So you still write ال, but in speech the l is not pronounced separately.

This happens with many letters, not just ض.

Because ضرر is a masculine singular noun.

In Arabic, the predicate adjective agrees with the noun in gender and number. So:

• الضرر كبير = The damage is big/serious.

If the noun were feminine, the adjective would also be feminine:

• المشكلة كبيرة = The problem is big/serious.

So كبير matches ضرر.

الضرر means harm or damage.

Depending on context, it can refer to:

• physical damage
• injury or harm
• legal or financial harm
• negative effects in general

So this sentence could mean:

• The damage is great
• The harm is serious
• The damage is significant

In Egyptian Arabic, ضرر is perfectly understandable, but it can sound a bit more serious or formal than some everyday alternatives.

It is natural and correct, and Egyptians will understand it easily.

That said, it sounds a bit neutral-to-formal, especially because of the word ضرر, which is common in:

• news
• medicine
• law
• official or serious discussion

In very casual speech, people might choose other wording depending on the situation. But الضرر كبير is absolutely fine and natural in the right context.

It can definitely mean more than just physical size.

With abstract nouns like:

• damage
• harm
• problem
• mistake

كبير often means:

• serious
• major
• significant
• great

So in this sentence, an English speaker would often translate it more naturally as:

• The damage is serious or
• The damage is significant

not necessarily just big.

To negate it in Egyptian Arabic, you can say:

• الضرر مش كبير = The damage is not big/serious.

To make it stronger, you can say:

• الضرر كبير أوي = The damage is very big/serious.
• الضرر كبير جدًا = The damage is very big/serious.

In Egyptian speech, أوي is very common and natural. جداً is understood everywhere, but sounds more formal.