غرفة المعيشة كبيرة.

In Arabic, the verb to be is usually omitted in the present tense.

So غرفة المعيشة كبيرة literally looks like living-room big, but it means The living room is big.

This is very normal in Arabic:

• البيت كبير = The house is big
• الجو جميل = The weather is nice

If you want was or will be, Arabic does use verbs:

• كانت غرفة المعيشة كبيرة = The living room was big
• ستكون غرفة المعيشة كبيرة = The living room will be big

This is a common Arabic structure called an iḍāfa (possessive or noun-linking construction).

It is made of:

• غرفة = room
• المعيشة = the living / the act of living

Together, غرفة المعيشة literally means something like room of living, which is how Arabic expresses living room.

This pattern is very common:

• غرفة النوم = bedroom
• باب البيت = the door of the house / the house door
• مدير المدرسة = the school principal

In an iḍāfa construction, the first noun usually does not take الـ. Definiteness is often shown by the second noun.

So:

• غرفة معيشة = a living room
• غرفة المعيشة = the living room

Because المعيشة is definite, the whole phrase غرفة المعيشة becomes definite.

This is a very important rule in Arabic grammar.

Because غرفة is a feminine noun.

In Arabic, adjectives must agree with the noun they describe in gender and number. Since غرفة is feminine singular, the adjective must also be feminine singular:

• غرفة كبيرة = a big room
• غرفة المعيشة كبيرة = the living room is big

If the noun were masculine, you would use كبير:

• البيت كبير = the house is big

A good clue here is that غرفة ends in ة (tāʾ marbūṭa), which often marks feminine nouns.

Because here كبيرة is a predicate adjective, not an attributive adjective.

Compare these two patterns:

1. Attributive adjective: directly describes a noun inside a noun phrase

   • غرفة المعيشة الكبيرة = the big living room

2. Predicate adjective: comes after the subject and means is big

   • غرفة المعيشة كبيرة = the living room is big

In the second pattern, the adjective is usually indefinite, so it does not take الـ.

Not exactly.

• غرفة المعيشة كبيرة = The living room is big
• غرفة المعيشة الكبيرة = the big living room

So the first is a complete sentence.
The second is just a noun phrase, not a full statement by itself.

This is an important distinction in Arabic:

• no الـ on the adjective after the subject often means is ...
• matching الـ on both noun and adjective means the ... adjective noun

A common pronunciation is:

ghurfat al-maʿīsha kabīra

A few helpful notes:

• غ sounds like a French r or a voiced gargling sound.
• ع in المعيشة is a deep throat sound with no exact English equivalent.
• The ة in غرفة is pronounced as -t here, because غرفة is the first word in an iḍāfa: ghurfat al-maʿīsha.
• At the end of كبيرة, the ة is usually pronounced -a in normal pause: kabīra.

Because غرفة is followed by another noun in an iḍāfa construction.

On its own, غرفة is usually pronounced:

• ghurfa

But in an iḍāfa, the ending connects and becomes:

• ghurfat al-maʿīsha

This is very common:

• مدينة on its own: madīna
• مدينة القاهرة: madīnat al-qāhira

So the written form does not change, but the pronunciation does.

Yes, in full formal Arabic there are case endings, although they are often not written in everyday texts and are often not pronounced in normal speech.

Fully vocalized, the sentence could be:

غرفةُ المعيشةِ كبيرةٌ

Here:

• غرفةُ is nominative because it is the subject
• المعيشةِ is genitive because it is the second noun in the iḍāfa
• كبيرةٌ is nominative as the predicate

In most modern written Arabic outside careful grammar texts, you will usually just see:

• غرفة المعيشة كبيرة

Yes, but غرفة المعيشة كبيرة is the normal and simplest order.

This is a standard nominal sentence:

• subject: غرفة المعيشة
• predicate: كبيرة

You may sometimes see different word order for style or emphasis, but for learners, the safest pattern is:

[noun phrase] + [adjective/predicate]

For example:

• السيارة سريعة = the car is fast
• القصة طويلة = the story is long

So your sentence follows a very common pattern.

المعيشة comes from the root related to living or livelihood. In this expression, it refers to living in the sense of daily life.

So:

• معيشة can relate to living, livelihood, or way of life
• غرفة المعيشة is the standard expression for living room

Even if the literal sense feels unusual in English, it is just the normal Arabic name for that room.