باب الاوضة اسود.

A simple learner-friendly pronunciation is bab el-oda eswid.

A slightly more detailed version is bāb il-ōḍa iswid.

Notes:

• باب = bab
• الأوضة / الاوضة = el-oda
• أسود = eswid / iswid

The d in oda is a heavier Arabic d sound, and أسود is often pronounced iswid/eswid in Egyptian speech.

• باب = door
• الأوضة = the room
• باب الأوضة = the door of the room / the room's door
• أسود = black

So the structure is basically:

[the room's door] + [black]

Because in Arabic, present-tense sentences like this usually do not use a separate word for is / am / are.

So:

• باب الأوضة أسود = The room door is black

This is normal Arabic sentence structure.
If you wanted past tense, then you would use a verb, for example with كان for was.

Because باب الأوضة is an idafa construction, often called a construct phrase.

In this pattern:

• the first noun usually does not take الـ
• the second noun shows whether the whole phrase is definite

So:

• باب أوضة = a room door / the door of a room
• باب الأوضة = the room’s door / the door of the room

Even without الـ on باب, the whole phrase is definite because الأوضة is definite.

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

In Arabic, after a definite subject, the predicate is normally indefinite:

• باب الأوضة أسود = The room door is black

But if you were saying the black door of the room, then black is describing the noun directly, so it becomes definite:

• باب الأوضة الأسود = the black door of the room

That is a very important difference.

This is Egyptian Arabic.

The biggest clue is أوضة, which is the everyday Egyptian word for room.

In Modern Standard Arabic, you would usually say:

• باب الغرفة أسود

So:

• أوضة = Egyptian everyday word
• غرفة = Standard Arabic word

Because informal Arabic writing often leaves out some hamza spelling details.

So in casual writing, many people write:

• الاوضة

instead of the more careful spelling:

• الأوضة

They refer to the same word. This is very common in texting and informal Egyptian writing.

Because it agrees with باب, and باب is masculine singular.

In Arabic, adjectives agree with the noun they describe in gender and number.

Here:

• باب = masculine singular
• so أسود / iswid = masculine singular

If the thing being described were feminine, Egyptian Arabic would usually use سودا.

For example:

• الأوضة سودا = The room is black

No. It means the door is black, not the room.

That is because أسود matches باب:

• باب is masculine
• أسود is masculine

But أوضة is feminine, so if you meant The room is black, you would normally say:

• الأوضة سودا

So the grammar tells you that black belongs with door, not room.

You would say:

• باب الأوضة الأسود

That means the black door of the room.

Compare:

• باب الأوضة أسود = The room door is black
• باب الأوضة الأسود = the black door of the room

So the final word changes its job:

• أسود = predicate, giving information about the subject
• الأسود = adjective, directly describing the noun phrase

A natural negative sentence would be:

• باب الأوضة مش أسود = The room door is not black

In Egyptian Arabic, مش is the common way to negate this kind of sentence.