Blițul nu merge.

Because -ul is the Romanian definite article attached to the end of the noun.

• bliț = flash
• blițul = the flash

Unlike English, Romanian usually puts the at the end of the noun instead of before it.

So in this sentence, blițul specifically means the flash.

Here, bliț usually means a camera flash or the flash on a phone/camera.

It does not normally mean lightning. For lightning, Romanian uses fulger.

So Blițul nu merge. would naturally be understood as The flash isn’t working.

The letter ț is pronounced like ts in cats or bits.

So bliț is pronounced roughly like blits.

A few pronunciation notes:

• ț is a separate Romanian letter, not just a decorated t
• it represents the sound ts
• in informal typing, people sometimes write blit, but the correct spelling is bliț

Yes, a merge often means to go or to walk, but it also very commonly means to work, to function, or to run properly.

So:

• Telefonul merge. = The phone works.
• Internetul nu merge. = The internet isn’t working.
• Blițul nu merge. = The flash isn’t working.

This is one of the most common everyday uses of a merge.

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

So:

• merge = works / goes
• nu merge = doesn’t work / doesn’t go

This is the standard way to negate a verb in Romanian.

Romanian does not use a helper verb like English do/does for negation.

In English, you say:

• It works
• It does not work

But in Romanian, you simply negate the main verb directly:

• merge
• nu merge

So nu merge literally looks like not works, but in natural English it means doesn’t work.

Merge is the 3rd person singular present tense of a merge.

That matches blițul, which is singular:

• blițul = the flash
• merge = works / is working

So the grammar is:

• subject: blițul
• negation: nu
• verb: merge

Yes. Blițul nu funcționează is also correct and means essentially the same thing.

The difference is mostly in style:

• nu merge = very common, everyday, natural
• nu funcționează = a bit more explicit, slightly more formal or technical

In everyday speech, Romanians very often prefer nu merge for devices, machines, apps, websites, and similar things.

Yes, Romanian word order is somewhat flexible.

The most neutral version is:

• Blițul nu merge.

But you may also hear:

• Nu merge blițul.

That can sound more conversational or place a little more emphasis on the fact that it isn’t working.

Still, for learners, Blițul nu merge. is the safest and most straightforward pattern.

It is natural Romanian.

Romanians very commonly say X nu merge for all kinds of things that are not functioning properly, such as:

• Mașina nu merge.
• Laptopul nu merge.
• Wi-Fi-ul nu merge.
• Blițul nu merge.

So this is a normal, idiomatic way to say that the flash is not working.