غرفة التبديل نظيفة.

In Arabic, the present-tense to be is usually not stated.

So:

• غرفة التبديل نظيفة literally looks like changing-room clean
• but it means The changing room is clean

This is a very normal Arabic sentence pattern, called a nominal sentence.

If you wanted a different tense, then Arabic would usually add a verb:

• كانت غرفة التبديل نظيفة = The changing room was clean
• رح تكون غرفة التبديل نظيفة = The changing room will be clean in Levantine

Because غرفة التبديل is an iḍāfa construction, often called a possessive/genitive construction.

In an iḍāfa:

• the first noun does not take الـ
• the second noun can make the whole phrase definite

So:

• غرفة تبديل = a changing room
• غرفة التبديل = the changing room

Even though غرفة does not have الـ, the whole phrase is definite because التبديل is definite.

This is very different from English, so it is a common thing learners ask about.

التبديل comes from a root related to changing or switching.

So غرفة التبديل literally means something like:

• room of changing
• or more naturally, changing room

This is a very common Arabic way to build compound nouns:
noun + noun instead of using an adjective or a separate linking word.

Because غرفة is a feminine noun.

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

• gender
• number
• definiteness, in some structures

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

• masculine: نظيف = clean
• feminine: نظيفة = clean

So:

• غرفة نظيفة = a clean room
• غرفة التبديل نظيفة = The changing room is clean

Because here نظيفة is the predicate of the sentence, not an adjective directly attached inside the noun phrase.

Compare these:

• الغرفة النظيفة = the clean room
  Here النظيفة is an adjective describing the noun inside one noun phrase, so it matches definiteness.

• الغرفة نظيفة = the room is clean
  Here نظيفة is the predicate, so it does not take الـ.

Your sentence works the same way:

• غرفة التبديل نظيفة = The changing room is clean

So if you add الـ and say غرفة التبديل النظيفة, that changes the meaning to something like the clean changing room, not the changing room is clean.

A common Levantine-style pronunciation would be roughly:

ghirfet et-tabdīl nḍīfe

A few useful notes:

• غرفة is often pronounced ghirfe or ghurfe, and in an iḍāfa it becomes ghirfet / ghurfet
• الـ before ت gets assimilated, because ت is a sun letter
• so التبديل is written with الـ, but pronounced more like et-tabdīl or it-tabdīl
• نظيفة in Levantine is commonly pronounced nḍīfe

Pronunciation varies by country and city, so you may also hear slightly different vowels.

Because in an iḍāfa construction, the first noun is linked tightly to the second noun.

The written form is still غرفة, but in pronunciation the final ة often sounds like -t when another noun follows:

• alone: غرفة → ghirfe / ghurfe
• in iḍāfa: غرفة التبديل → ghirfet et-tabdīl

This is a very important pattern with ة in Arabic.

The ة is called tāʾ marbūṭa.

It often marks feminine nouns and adjectives.

In your sentence:

• غرفة is a feminine noun
• نظيفة is a feminine adjective

Its pronunciation changes depending on position:

• at the end of a pause, it often sounds like -a / -e
• before another word in a linked construction, it can sound like -t

So:

• غرفة alone: often ghirfe
• غرفة التبديل: often ghirfet et-tabdīl

The structure is:

• غرفة التبديل = the subject
• نظيفة = the predicate

So the pattern is:

[noun phrase] + [adjective predicate]

That gives:

The changing room + clean
= The changing room is clean

This is one of the most common sentence types in Arabic.

The written sentence is fully natural and understandable in both.

But the pronunciation and some everyday alternatives may differ.

In Levantine, people might say the same sentence exactly:

• غرفة التبديل نظيفة

But in very casual speech, depending on region, they might prefer different vocabulary for room or changing room.

Still, as a learner, this sentence is a good and solid model in both Standard Arabic and Levantine-style usage.

Not freely.

The normal order here is:

• غرفة التبديل نظيفة

That is the most natural neutral statement: The changing room is clean.

If you change the order, you may change the emphasis, or the sentence may sound unnatural in basic learner contexts.

So for now, the safest pattern to learn is:

• subject first
• predicate second

Example:

• البيت كبير = The house is big
• السيارة سريعة = The car is fast
• غرفة التبديل نظيفة = The changing room is clean