Il bambino è finalmente zitto.

In Italian, singular countable nouns usually need an article when you are talking about a specific person or thing.

So:

• il bambino = the child / the boy
• un bambino = a child / a boy

Just bambino by itself would usually sound incomplete here.

È is the third-person singular present tense of essere (to be).

So:

• io sono = I am
• tu sei = you are
• lui/lei è = he/she is

In Il bambino è finalmente zitto, è means is.

Also note the accent: è has a grave accent. It is different from e, which means and.

In Italian, zitto is an adjective, not a verb. It means quiet / silent / not speaking.

So Italian expresses this idea as:

• essere zitto = to be quiet
• literally, to be silent/quiet

This is different from English, where we often use be quiet as if it were a fixed verbal expression.

Yes, zitto is an adjective, so it changes to match gender and number.

Forms:

• zitto = masculine singular
• zitta = feminine singular
• zitti = masculine plural or mixed plural
• zitte = feminine plural

Examples:

• Il bambino è zitto.
• La bambina è zitta.
• I bambini sono zitti.
• Le bambine sono zitte.

Since bambino is masculine singular, zitto is also masculine singular.

Both can relate to quietness, but they are not used in exactly the same way.

• zitto usually means quiet, especially not speaking
• silenzioso means silent or quiet in a broader sense, often describing a place, environment, or manner

For a child who has stopped talking, zitto is much more natural.

Compare:

• Il bambino è zitto. = The child is quiet / not saying anything.
• La stanza è silenziosa. = The room is silent.

Finalmente means finally / at last.

It adds the idea that the speaker has been waiting for this situation, often with relief or impatience.

So the sentence suggests something like:

• the child was noisy, talking, crying, or bothering people
• now, at last, he is quiet

It often carries a bit of emotion: relief, satisfaction, or even annoyance.

That placement is very natural in Italian.

• Il bambino è finalmente zitto.

It puts the focus on the result: he is finally quiet.

Italian word order is somewhat flexible, so you could also hear:

• Finalmente il bambino è zitto.
• Il bambino finalmente è zitto.

But the original version sounds very normal and idiomatic.

It usually sounds at least a little emotional.

Because of finalmente, the speaker often implies:

• relief
• impatience
• satisfaction
• mild frustration before this moment

So it is not just a dry factual statement. It often means something like:

• At last, the child is quiet.

Yes, but the meaning shifts slightly.

• Il bambino è zitto = The child is quiet.
• Il bambino sta zitto = The child is staying quiet / keeping quiet.

Essere zitto describes a state. Stare zitto often emphasizes remaining in that state, or behaving that way.

Also, stai zitto! is a very common command meaning be quiet! / shut up!, depending on tone.

So in your sentence, è zitto is the most straightforward choice.

It can mean either, depending on context.

• often bambino = boy
• sometimes more generally child

If you specifically want girl, you would say bambina.

Since you said the meaning is already known, the important thing for learners is that bambino is grammatically masculine singular, which is why the sentence uses:

• il
• è
• zitto

A simple pronunciation guide is:

Il bambino è finalmente zitto
eel bam-BEE-no eh fee-nahl-MEN-teh TSEET-toh

A few helpful notes:

• bambino is stressed on -bi-
• finalmente is stressed on -men-
• zitto has a double tt, so the t sound is held slightly longer than in English
• zi in zitto sounds like tsi or dzi depending on accent, but learners will often hear something close to TSEET-to

By itself, zitto is not rude in a descriptive sentence like this one:

• Il bambino è finalmente zitto.

But as a command, it can sound strong:

• Zitto!
• Stai zitto!

Depending on tone, those can mean:

• Be quiet!
• Shut up!

So learners should be careful when using zitto directly to another person.

Yes. Il is used because bambino is a masculine singular noun beginning with a normal consonant.

Compare:

• il bambino
• lo studente
• l’amico
• la bambina

So if the noun changed, the article might change too, but with bambino, il is correct.