باب الحمام وسخ.

Because باب الحمام is an iḍāfa construction, often called a possessive or of-phrase.

• باب = door
• الحمام = the bathroom

So باب الحمام literally means door of the bathroom.

In an iḍāfa, the first noun usually does not take الـ. The definiteness comes from the second noun. Since الحمام is definite, the whole phrase باب الحمام is definite too, so it means the bathroom door, not a bathroom door.

In Arabic, simple present-tense sentences often do not use a word for is / are / am.

So:

• باب الحمام وسخ = The bathroom door is dirty

Literally, it looks more like:

• bathroom door dirty

This is completely normal in Arabic. If you wanted was, then you would use a verb, such as كان.

Because here وسخ is the predicate of the sentence, not an adjective inside the noun phrase.

In other words:

• باب الحمام = the subject: the bathroom door
• وسخ = what you are saying about it: dirty

So the structure is:

• [the bathroom door] [dirty]
• meaning: The bathroom door is dirty

If you said باب الحمام الوسخ, that would mean the dirty bathroom door, where الوسخ is directly describing the noun.

So:

• باب الحمام وسخ = The bathroom door is dirty
• باب الحمام الوسخ = the dirty bathroom door

Because باب is a masculine singular noun, and the adjective/predicate agrees with it.

• باب = masculine singular
• so وسخ = masculine singular

If the noun were feminine singular, you would normally use وسخة.

For example:

• الأوضة وسخة = The room is dirty

It is an iḍāfa construction: noun + noun.

The first noun is the thing being possessed or specified:

• باب = door

The second noun tells you whose door / what kind of door:

• الحمام = the bathroom

So باب الحمام means:

• the door of the bathroom
• natural English: the bathroom door

This is a very common Arabic pattern, and English speakers should get used to it because Arabic uses it all the time.

Examples:

• باب البيت = the house door
• مفتاح العربية = the car key
• لون الحيطة = the wall color

A simple pronunciation guide is:

bab il-hammam wisikh

You may also see it written as:

bab el-hammam wisikh

A few notes:

• باب = bab
• الحمام = il-hammam / el-hammam
• وسخ = wisikh

In الحمام, the ل of الـ is pronounced normally because ح is a moon letter, not a sun letter.

No. الحمام can also mean pigeons or doves, depending on context.

But in this sentence, باب الحمام clearly means the bathroom door, because door of the pigeons would not make much sense in normal everyday context.

In Egyptian Arabic, حمّام commonly means:

• bathroom
• toilet
• restroom

The exact English translation depends on context.

Yes, it is natural and understandable.

A speaker of Egyptian Arabic can absolutely say:

• باب الحمام وسخ

You might also hear other natural variants, such as:

• باب الحمام متوسخ = The bathroom door is dirty / filthy
• باب التواليت وسخ = The toilet door is dirty

But the sentence you have is fine and normal.

For a plain, neutral statement, باب الحمام وسخ is the normal order.

That is:

• subject
  • predicate

If you move things around, the sentence may sound marked, poetic, or unnatural in everyday speech.

So for a learner, the safest pattern is:

• باب الحمام وسخ
• الأكل حلو
• الجو حر

This is a very common Arabic sentence pattern.

In Egyptian Arabic, you would normally use مش:

• باب الحمام مش وسخ

That means:

• The bathroom door is not dirty

This is the usual Egyptian way to negate this kind of sentence.

You would say:

• باب الحمام الوسخ

Here, الوسخ is an adjective directly modifying the noun phrase, so it takes الـ because the noun phrase is definite.

Compare:

• باب الحمام وسخ = The bathroom door is dirty
• باب الحمام الوسخ = the dirty bathroom door

This is a very important difference in Arabic:

• no الـ on the adjective after the subject often means a sentence predicate
• with الـ on the adjective it becomes part of the noun phrase