الجبل كبير.

In Egyptian Arabic, it is commonly pronounced:

el-gabal kibiir

A rough breakdown:

• الـ = el-
• جبل = gabal
• كبير = kibiir

So the whole sentence sounds like el-gabal kibiir.

A learner may notice that in Modern Standard Arabic, ج is usually pronounced like j in jam, so جبل would be jabal there. In Egyptian Arabic, ج is usually pronounced like g in go, so it becomes gabal.

In Arabic, present-tense sentences like The mountain is big usually do not need a separate word for is.

So:

• الجبل كبير literally looks like the mountain big
• but it means The mountain is big

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

If you wanted to say it in the past, then Arabic would use a verb:

• الجبل كان كبير = The mountain was big
  In Egyptian, you would often hear el-gabal kan kibiir.

الـ is the Arabic definite article, meaning the.

So:

• جبل = mountain
• الجبل = the mountain

In Egyptian Arabic, الـ is usually pronounced el-, even though it is often written the same way as in Standard Arabic.

In Arabic, adjectives normally come after the noun they describe.

So instead of:

• big mountain

Arabic says:

• mountain big

That is why you get:

• الجبل كبير = The mountain is big

This word order is very normal in Arabic.

Because here كبير is not being used as the big one. It is the predicate of the sentence: it tells us something about the mountain.

In Arabic sentences like this:

• الجبل كبير = The mountain is big

the describing word often stays indefinite, so it does not take الـ.

Compare:

• الجبل كبير = The mountain is big
• الجبل الكبير = the big mountain

That second example is a noun phrase, not a full sentence.

So:

• الجبل كبير = a complete sentence
• الجبل الكبير = just a phrase

The spelling الجبل كبير works perfectly as written Arabic and is very close to Standard Arabic in form.

In Egyptian Arabic, people would often pronounce it:

• el-gabal kibiir

So you can think of it like this:

• written form: often looks the same or very similar
• spoken Egyptian pronunciation: el-gabal kibiir

A native Egyptian speaker would understand it easily, and it fits Egyptian speech well when pronounced the Egyptian way.

That is one of the most famous features of Egyptian Arabic.

In Modern Standard Arabic:

• ج is usually pronounced j
• so جبل = jabal

In Egyptian Arabic:

• ج is usually pronounced g
• so جبل = gabal

This is a regular sound pattern in Egyptian Arabic, not just for this word.

Egyptian Arabic often changes some short vowels compared with Standard Arabic.

So:

• Standard Arabic: kabīr
• Egyptian Arabic: kibiir

Both refer to the same word, meaning big.
This kind of vowel change is very common when moving from Standard Arabic to Egyptian Arabic pronunciation.

Yes. In Arabic, adjectives and predicate adjectives normally agree with the noun in gender and number.

Here:

• الجبل is masculine singular
• so كبير is also masculine singular

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

• البنت كبيرة = The girl is big

So agreement is important in Arabic.

In this sentence, كبير means big or large.

Depending on context, كبير can also mean things like:

• old/older
• senior
• important
• great

But with الجبل (the mountain), the natural meaning is big or large.

No, not this exact sentence.

Because الجبل has الـ, it means the mountain, not a mountain.

So:

• الجبل كبير = The mountain is big

If you wanted A mountain is big, Arabic would phrase things differently, and in natural usage the context would matter a lot.

Because Arabic is normally written without short vowel marks in everyday texts.

So الجبل كبير is the normal way to write it.

A fully vowelled version in Standard Arabic could look like:

• اَلْجَبَلُ كَبِيرٌ

But in normal writing, those extra vowel marks are usually left out.

For learners, this means you often have to know the word already or learn it from context and listening.

It is a complete sentence.

• الجبل = the mountain
• كبير = big

Together they mean:

• The mountain is big

If it were just a phrase, like the big mountain, then it would be:

• الجبل الكبير

So the difference is important:

• الجبل كبير = The mountain is big
• الجبل الكبير = the big mountain