Fatto sta che il lucchetto non si apre.

Fatto sta che is an idiomatic expression meaning something like the fact is that, the thing is that, or what it comes down to is that.

It often introduces the important point after some discussion, explanation, or uncertainty.

So in this sentence, Fatto sta che il lucchetto non si apre means roughly:

• The fact is that the padlock won’t open
• The thing is, the padlock doesn’t open

It sounds a little more emphatic than a plain il fatto è che.

Both are possible, but they are not exactly the same in tone.

• Il fatto è che... = the fact is that...
• Fatto sta che... = the fact remains that... / the bottom line is that...

Fatto sta che is a fixed expression and feels more idiomatic. It often suggests: whatever else may be true, this is the important reality.

So:

• Il fatto è che il lucchetto non si apre = neutral
• Fatto sta che il lucchetto non si apre = slightly more idiomatic and conclusive

The che introduces the clause that explains the fact.

In English, it works like that in:

• The fact is that the padlock won’t open

So:

• Fatto sta = the fact remains
• che il lucchetto non si apre = that the padlock doesn’t open / won’t open

Italian uses che very often to introduce this kind of clause.

Lucchetto means padlock.

It usually refers to the small removable lock you might put on a gate, chain, locker, suitcase, or fence.

It is different from a general lock built into a door. For example:

• lucchetto = padlock
• serratura = lock / keyhole mechanism

So this sentence is specifically talking about a padlock, not just any lock.

Italian uses definite articles more often than English does.

Here, il lucchetto means the padlock, referring to a specific padlock already known from the context.

English might sometimes say just the lock, but Italian normally keeps the article:

• il lucchetto
• la porta
• la chiave

That is completely normal and expected.

Because with things like doors, windows, jars, padlocks, and gates, Italian often uses aprirsi when the thing itself is the subject.

So:

• aprire qualcosa = to open something
  • Apro il lucchetto = I open the padlock
• aprirsi = to open / to come open
  • Il lucchetto si apre = The padlock opens
  • Il lucchetto non si apre = The padlock doesn’t open / won’t open

In English, we often just say the padlock won’t open. Italian commonly uses si in this structure.

Not in the literal sense of the padlock opens itself.

This si is part of a very common Italian pattern where something is presented as undergoing a change of state by itself or in a general way. With verbs like aprire, this is extremely common.

So si apre is best understood as:

• opens
• comes open
• can be opened depending on context

In this sentence, non si apre usually means:

• it won’t open
• it doesn’t open

So although it looks reflexive, it is better to think of it as a normal Italian way to express that the object does not open.

They are different in focus.

• Il lucchetto non si apre = The padlock won’t open / doesn’t open

  • Focus on the padlock and the result
  • Very natural in everyday Italian

• Il lucchetto non viene aperto = The padlock is not being opened

  • Focus on an action done by someone
  • Sounds more like a true passive

So in your sentence, non si apre does not mean that nobody is opening it. It means that the padlock is not opening.

Both are in the present indicative.

• sta = present of stare
• si apre = present of aprirsi

But the present tense in Italian, like in English, can cover several ideas depending on context:

• a present fact
• a general truth
• something happening now
• even something like won’t open in the immediate situation

So il lucchetto non si apre can mean:

• the padlock doesn’t open
• the padlock isn’t opening
• the padlock won’t open

Context determines the best English translation.

Yes, but it means something slightly different.

• Il lucchetto non si apre = The padlock won’t open / doesn’t open
  • the most natural choice here
• Il lucchetto non si sta aprendo = The padlock isn’t opening
  • more focused on the action in progress right now

In many everyday situations, Italian prefers the simple present where English might use a progressive form. So non si apre is the more idiomatic choice in this sentence.

Yes, a little—but it is still quite common and natural.

It is not extremely formal, but it is more stylistically marked than a plain il fatto è che or insomma. It can sound:

• conclusive
• slightly emphatic
• sometimes a bit narrative

You might hear it in conversation, but it is also common in storytelling and written Italian.

So it is a useful phrase to recognize and learn, especially because it has a very natural idiomatic feel.