Stopul este defect.

Romanian usually puts the definite article at the end of the noun instead of using a separate word before it.

So:

• un stop = a stop
• stopul = the stop

Here, -ul is the definite article ending used with many masculine/neuter singular nouns.

It is usually treated as a neuter noun.

That can be confusing at first, because Romanian neuter nouns behave:

• like masculine in the singular
• like feminine in the plural

So you get:

• singular: stopul este defect
• plural: stopurile sunt defecte

This is a very common Romanian pattern for inanimate nouns.

Because adjectives in Romanian must agree with the noun.

Since stopul is singular, and neuter nouns use masculine forms in the singular, the adjective is defect.

Compare:

• stopul este defect = singular neuter, using masculine form
• ușa este defectă = feminine singular
• stopurile sunt defecte = neuter plural

So defect is the correct agreement form here.

Este is the 3rd person singular of a fi, which means to be.

So it means is.

Structure:

• stopul = the stop
• este = is
• defect = defective / broken

Romanian normally keeps this verb in sentences like this, just as English uses is.

Yes. That is completely normal.

E is the short, very common spoken form of este.

So:

• Stopul este defect. = more neutral or slightly more formal
• Stopul e defect. = very common in everyday speech

Both are correct.

Stopul este defect is the normal, neutral word order.

A useful contrast is:

• Stopul este defect. = full sentence, The stop is defective
• stopul defect = noun phrase, the defective stop

So if you remove este, you no longer have the same kind of structure.

In this sentence, defect is not directly attached to the noun as part of the noun phrase. It is a predicate adjective, linked by este.

That is why the structure is:

• noun + to be
  • adjective

If you want the adjective inside the noun phrase, Romanian usually puts it after the noun:

• stopul defect = the defective stop

So the sentence and the noun phrase are different structures.

The plural would be:

Stopurile sunt defecte.

Changes:

• stopul → stopurile
• este → sunt
• defect → defecte

This shows both noun and adjective agreement clearly.

Yes, it is a borrowing, but in Romanian it behaves like a normal Romanian noun.

That means it can take Romanian endings:

• un stop
• stopul
• două stopuri
• stopurile

So even though the word looks familiar to an English speaker, its grammar is fully Romanian.

Often yes, depending on context.

A rough difference is:

• defect = defective / faulty
• stricat = broken / not working

In many everyday situations, both can sound natural.
But defect can feel a bit more technical, while stricat is often more conversational.

A simple approximation is:

STOP-ul YEH-ste de-FEKT

A few notes:

• stopul: stress on STOP
• este: usually pronounced YES-teh or close to YEH-ste
• defect: stress on the last syllable, -FEKT

If you use the shorter spoken version, it becomes:

STOP-ul e de-FEKT