Vull el pis moblat.

• Vull = I want
• el = the
• pis = flat / apartment
• moblat = furnished

So the sentence means I want the flat furnished or, depending on context, I want the furnished flat.

In Catalan, subject pronouns are often left out because the verb ending already shows who the subject is.

• vull = I want
• vols = you want
• vol = he/she/it wants

So jo is not necessary here. You can say Jo vull el pis moblat, but it usually adds emphasis, like I want the flat furnished.

El means the, while un means a.

• Vull el pis moblat = I want the flat furnished / I want the furnished flat
• Vull un pis moblat = I want a furnished flat

So el refers to a specific flat, while un refers to any flat of that kind.

In Catalan, adjectives often come after the noun.

• el pis moblat = the furnished flat
• literally: the flat furnished

This is very normal in Catalan. English often puts adjectives before the noun, but Catalan usually places them after.

Moblat is the past participle of moblar (to furnish), but here it works as an adjective meaning furnished.

It agrees with the noun it describes:

• el pis moblat = masculine singular
• la casa moblada = feminine singular
• els pisos moblats = masculine plural
• les cases moblades = feminine plural

So the ending changes depending on the noun.

Because pis is a masculine singular noun.

That means the adjective must also be masculine singular:

• el pis moblat
• la casa moblada

Catalan adjectives usually agree in gender and number with the noun.

It can suggest either idea, depending on context.

1. Attributive idea: the furnished flat

   • You are identifying which flat you want.

2. Resulting/state idea: I want the flat furnished

   • You want the flat to be in that condition.

In real use, this sentence is often understood as I want the flat furnished. If you want to make that idea more explicit, you could also say something like Vull que el pis estigui moblat.

Yes. That is a more explicit way to say I want the flat to be furnished.

Compare:

• Vull el pis moblat = shorter, more compact
• Vull que el pis estigui moblat = more explicit: I want the flat to be furnished

Both are natural, but the second one spells out the idea more clearly.

Yes, pis is a very common everyday word, especially in Catalan from Spain, for flat/apartment.

A few useful notes:

• pis often corresponds closely to British English flat
• In many contexts, it also matches American English apartment
• apartament exists too, but it often sounds more like apartment unit, holiday apartment, or a more specific type of accommodation depending on context

So pis is the most normal everyday choice here.

A simple approximate pronunciation is:

VOOY el PEES moo-BLAT

A few details:

• vull sounds roughly like vooy or booly without the final y fully pronounced, depending on accent
• pis sounds like peace
• moblat has stress on the last syllable: mo-BLAT

Pronunciation varies somewhat across Catalan-speaking regions, but that approximation is good enough for a learner to start with.