الموسم طويل.

A common Egyptian pronunciation is el-MO-sem ta-WEEL.

A slightly more detailed breakdown:

• الموسم → el-mōsem or il-mōsem
• طويل → ṭawīl, often written taweel

Notes:

• The ṭ in ṭawīl is a heavy/emphatic t sound.
• Stress is roughly on MO in الموسم and on WEEL in طويل.

Because Arabic normally leaves out the present-tense verb to be.

So in Egyptian Arabic:

• الموسم طويل = The season is long

This is called a nominal sentence: a sentence made of a subject plus a description, without saying is.

But in other tenses, Arabic does use a verb:

• الموسم كان طويل = The season was long
• الموسم هيبقى طويل = The season will be long

Because الموسم is the subject, and طويل is the predicate adjective.

In Arabic, when an adjective is part of the predicate, it is usually indefinite:

• الموسم طويل = The season is long

If you make the adjective definite too, it stops being a sentence and becomes a noun phrase:

• الموسم الطويل = the long season

So the missing الـ on طويل is very important.

It is a full sentence.

Structure:

• الموسم = the subject
• طويل = what is being said about the subject

So this is not just noun + adjective in the English sense. It is more like:

• The season
  • long
• which Arabic understands as The season is long

Compare:

• الموسم طويل = The season is long
• الموسم الطويل = the long season

That contrast is one of the most useful things to notice here.

Yes. Arabic adjectives normally agree with the noun they describe or refer to.

Here:

• الموسم is masculine singular
• so طويل is also masculine singular

If the noun were feminine singular, you would usually use طويلة instead:

• السنة طويلة = The year is long

So agreement still matters, even though طويل here is a predicate adjective.

The written sentence is basically the same, but the pronunciation is different.

In Modern Standard Arabic, it could be read as:

• al-mawsimu ṭawīlun

In Egyptian Arabic, it is more like:

• el-mōsem ṭawīl

Main differences:

• Egyptian usually says el-/il- instead of al-
• Egyptian does not use the case endings you hear in careful Standard Arabic
• some vowels are pronounced differently in speech

So the spelling may look familiar across both, but the spoken form is more Egyptian here.

Usually, no. In normal Egyptian Arabic, that sounds unnatural for a simple sentence like this.

The natural form is:

• الموسم طويل

Arabic normally does not add a separate word for is in the present tense.

Using هو here would usually sound overly emphatic, awkward, or non-native in everyday speech. For a basic statement, just leave it out.

In Egyptian Arabic, الـ is commonly pronounced el- or il-.

So:

• الموسم is pronounced el-mōsem / il-mōsem

Also, the ل of الـ is pronounced clearly here because م is a moon letter.

With sun letters, the ل sound disappears into the next consonant. For example, if you had الطويل, it would be pronounced more like:

• et-taweel in Egyptian Arabic

So:

• الموسم → el-mōsem because م is a moon letter
• الطويل → et-taweel because ط is a sun letter