Centura de siguranță nu este deteriorată.

Because centura de siguranță is a fixed expression meaning seat belt or literally safety belt.

• centură = belt / strap / band
• de siguranță = of safety / safety

So centura de siguranță means the safety belt / the seat belt.

Also, centura here includes the definite article, so it means the belt, not just a belt.

Literally, de siguranță means of safety.

Romanian often uses de + noun to describe the type or purpose of something:

• centură de siguranță = safety belt / seat belt
• ochelari de soare = sunglasses, literally glasses of sun
• perie de dinți = toothbrush, literally brush of teeth

So in this sentence, de siguranță tells you what kind of belt it is.

Because centură is the basic dictionary form, meaning a belt or belt.

Romanian usually adds the definite article to the end of the noun instead of putting a separate word like the in front.

So:

• centură = a belt / belt
• centura = the belt

This is very common in Romanian:

• mașină = car
• mașina = the car

So centura de siguranță means the seat belt.

Yes. The noun centură is feminine singular.

That matters because other words in the sentence must agree with it. In particular, deteriorată is feminine singular too.

You can see the agreement here:

• centura = feminine singular
• deteriorată = feminine singular form of deteriorat (damaged)

Because deteriorată must agree with centura, which is feminine singular.

Romanian adjectives often change form depending on gender and number.

Here are some forms of deteriorat:

• deteriorat = masculine singular
• deteriorată = feminine singular
• deteriorați = masculine plural
• deteriorate = feminine plural

Since centura is feminine singular, the correct form is deteriorată.

Este means is.

It is the 3rd person singular form of the verb a fi (to be).

So:

• este = is

In this sentence, nu este deteriorată means is not damaged.

Structure:

• Centura de siguranță = the seat belt
• nu este = is not
• deteriorată = damaged

Because nu is the normal Romanian word for not, and it usually goes directly before the verb.

So:

• este = is
• nu este = is not

This is standard Romanian word order.

Examples:

• Mașina nu este aici. = The car is not here.
• Ușa nu este deschisă. = The door is not open.

Yes. In informal spoken Romanian, este is often shortened to e.

So you may hear:

• Centura de siguranță nu e deteriorată.

This means exactly the same thing as:

• Centura de siguranță nu este deteriorată.

The full form este is more neutral and a bit more formal or careful.

Because in expressions like centură de siguranță, the second noun often stays indefinite in Romanian.

This is similar to how English says seat belt, not belt of the safety.

So:

• centură de siguranță = safety belt / seat belt

Here, siguranță is part of the type-name of the object, not a separate noun that needs to mean the safety.

In this sentence, it functions like an adjective meaning damaged.

Historically, it comes from a past participle, but for a learner the most useful thing is this:

• after a fi (to be), words like deteriorată, deschisă, închisă, ruptă often behave like adjectives describing the subject.

So:

• este deteriorată = is damaged
• este deschisă = is open
• este ruptă = is torn

Yes, sometimes, depending on context.

• deteriorată = damaged, deteriorated
• avariată = damaged, often with a sense of malfunction or physical damage, especially for vehicles or equipment

For a seat belt, deteriorată is very natural because it suggests wear, damage, or being in bad condition.

The word order is very straightforward:

• Centura de siguranță = subject
• nu este = verb with negation
• deteriorată = subject complement / descriptive adjective

So the pattern is basically:

Subject + not + is + adjective

This is close to English:

• The seat belt is not damaged.

Romanian:

• Centura de siguranță nu este deteriorată.

A few pronunciation points are especially important here:

• ă is a short central vowel, similar to the a in English sofa for many speakers.
• ț is pronounced ts, like the end of cats.
• siguranță is pronounced roughly see-goo-RAN-tsuh.

Very rough pronunciation of the full sentence:

CHEN-too-ra de see-goo-RAN-tsuh noo YES-te de-teh-ryo-RA-tuh

That is only approximate, but it helps with the main sounds.

Yes, absolutely. It sounds very natural in technical, safety, or inspection language.

For example, you might see or hear it in:

• a vehicle inspection
• a maintenance checklist
• a driving test context
• a safety manual

It is a standard, clear way to say that the seat belt is in good condition, or at least not damaged.