الدنيا كبيرة.

In Egyptian Arabic, it is commonly pronounced:

ed-donya kibiira

A more detailed breakdown:

• الدنيا → ed-donya
• كبيرة → kibiira

A few pronunciation notes:

• The ال at the start of الدنيا is not pronounced al here; in Egyptian it sounds more like el/ed depending on the next letter.
• The د gets doubled in pronunciation, so الدنيا sounds like ed-donya, not al-donya.
• كبيرة has a long ii sound: ki-bii-ra.

Because Arabic often uses nominal sentences in the present tense without a separate verb meaning is/are.

So:

• الدنيا كبيرة literally looks like the world big
• but it means The world is big

This is completely normal in both Egyptian Arabic and Standard Arabic.

If you wanted past or future, then Arabic would usually use a verb, but in the simple present, no is is needed.

Because in Arabic, adjectives usually come after the noun they describe.

So:

• الدنيا = the world / life
• كبيرة = big

Word order:

• noun first
• adjective second

That is the normal Arabic pattern, unlike English, where we say big world.

Because الدنيا is treated as a feminine noun, so the adjective must match it.

In Arabic, adjectives agree with the noun in things like:

• gender
• number
• definiteness

Since الدنيا is feminine, the adjective must also be feminine:

• masculine: كبير
• feminine: كبيرة

So الدنيا كبيرة is correct agreement.

A big clue is the ending ة, called taa marbuuTa.

In many words, this ending marks the feminine form.

So:

• كبير = big, masculine
• كبيرة = big, feminine

In Egyptian pronunciation, ة at the end is usually pronounced like -a, so كبيرة sounds like kibiira.

ال is the Arabic definite article, meaning the.

So:

• دنيا = world / life / earthly life
• الدنيا = the world / this world / life

In this sentence, it makes the noun definite, just like the in English.

Because د is a sun letter.

When ال comes before a sun letter, the l sound of ال disappears and the next consonant is doubled.

So:

• written: الدنيا
• underlyingly: al-dunya
• pronounced: ad-dunya or in Egyptian-style pronunciation ed-donya

This is a very common Arabic pronunciation rule.

Not always. الدنيا can mean a few related things depending on context, such as:

• the world
• this world
• life
• earthly life

In many everyday expressions, it can feel broader than just the physical planet. It can refer to worldly life in general.

So the exact translation depends on context, even though the grammar stays the same.

Actually, in this sentence, it usually can be understood without writing ال on the adjective in everyday Arabic explanation, but the key thing for learners is this:

In Arabic, when an adjective describes a definite noun, it normally matches it in definiteness too.

So in fuller formal agreement you would expect:

• الدنيا الكبيرة = the big world

But in الدنيا كبيرة, كبيرة is not just an adjective inside a noun phrase. It is the predicate of the sentence, meaning is big.

So this is:

• الدنيا = the subject
• كبيرة = the predicate

That is why it does not need ال here.

Yes. الدنيا كبيرة is a complete and natural sentence.

It has:

• a subject: الدنيا
• a predicate: كبيرة

Even without a word for is, it is a full sentence in Arabic.

The structure and words are understandable in both, but the pronunciation here is especially Egyptian if you say it as:

ed-donya kibiira

A more Standard Arabic-style pronunciation would be closer to:

ad-dunyaa kabiira

So:

• the sentence itself works in both
• the pronunciation changes depending on the variety of Arabic

They are related forms of the same adjective:

• كبير = kibiir in Egyptian
• كبيرة = kibiira

The feminine form adds the written ending ة, and in pronunciation that usually gives an extra -a at the end.

So the difference is:

• masculine: kibiir
• feminine: kibiira

Yes, but the meaning or emphasis can change.

The normal neutral order is:

• الدنيا كبيرة = The world is big

You may also hear different orders in speech for emphasis, but for learners, the safest basic pattern is:

• noun first
• description second

So الدنيا كبيرة is the best standard model to learn first.