Μίλα πιο χαμηλόφωνα, σε παρακαλώ, γιατί το παιδί κοιμάται.

Μίλα is the singular informal imperative of μιλάω / μιλώ (to speak).

So it means Speak... when you are talking to one person you address with εσύ.

In this sentence, it is a direct instruction:

• Μίλα πιο χαμηλόφωνα = Speak more softly

Greek uses the imperative very naturally in situations like this, especially when it is softened by σε παρακαλώ.

Yes. Μίλα is for:

• one person
• informal address

If you want to speak:

• politely to one person, or
• to more than one person

you would normally use Μιλάτε:

• Μιλάτε πιο χαμηλόφωνα, παρακαλώ.

You may also hear Μιλήστε in polite speech. For a learner, Μιλάτε and Μιλήστε are both useful to recognize, but Μίλα in your sentence is clearly the informal singular form.

πιο means more.

So:

• χαμηλόφωνα = softly / in a low voice
• πιο χαμηλόφωνα = more softly / more quietly

It is a comparative word, just like more in English.

Yes, in this sentence χαμηλόφωνα functions as an adverb.

It means:

• softly
• in a low voice
• quietly, depending on context

So:

• Μίλα χαμηλόφωνα = Speak softly
• Μίλα πιο χαμηλόφωνα = Speak more softly

For practical learning, it is best to treat χαμηλόφωνα here as a vocabulary item meaning in a low voice / softly.

Yes, absolutely.

A very common everyday alternative is:

• Μίλα πιο σιγά.

That also means Speak more quietly / more softly.

The difference is mostly one of wording:

• χαμηλόφωνα = more literally in a low voice
• σιγά = quietly / softly / gently

Both are natural, but πιο σιγά is especially common in everyday conversation.

Literally, σε παρακαλώ means something like:

• I beg you
• I ask you

Breakdown:

• σε = you (object form)
• παρακαλώ = I ask / I beg

But in normal everyday Greek, σε παρακαλώ usually works just like please.

So in this sentence it softens the command:

• Μίλα πιο χαμηλόφωνα, σε παρακαλώ = Please speak more softly

Because it is being used as a parenthetical polite expression.

It is not the main action of the sentence. The main structure is:

• Μίλα πιο χαμηλόφωνα ... γιατί το παιδί κοιμάται.

And σε παρακαλώ is inserted to make the request more polite.

Greek punctuation often sets this kind of expression off with commas, much like English:

• Speak more softly, please, because the child is sleeping.

Yes, γιατί can mean both:

• why?
• because

The meaning depends on context.

Here it means because, since it introduces a reason:

• γιατί το παιδί κοιμάται = because the child is sleeping

If it were a question, the intonation and punctuation would make that clear:

• Γιατί μιλάς τόσο δυνατά; = Why are you speaking so loudly?

So in your sentence, it is definitely because.

Greek uses the definite article very often, more often than English does.

Here, το παιδί means:

• the child
• the kid

It refers to a specific child that speaker and listener both know about.

If you said ένα παιδί, that would mean:

• a child

So:

• το παιδί κοιμάται = the child is sleeping
• ένα παιδί κοιμάται = a child is sleeping

κοιμάται is third person singular present tense of κοιμάμαι (to sleep).

It means:

• he/she/it sleeps
• he/she/it is sleeping

In this sentence, the natural English translation is is sleeping:

• το παιδί κοιμάται = the child is sleeping

A useful thing to remember is that Greek present tense often covers both:

• simple present: sleeps
• present progressive: is sleeping

The context tells you which one sounds best in English.

Because Greek usually does not build a progressive form with a separate verb like English is + -ing.

Instead, the present tense often does that job by itself.

So:

• κοιμάται can mean sleeps or is sleeping
• μιλάει can mean speaks or is speaking

In your sentence, the situation is happening right now, so English naturally uses is sleeping.

Yes, Greek word order is fairly flexible.

The sentence as given is very natural:

• Μίλα πιο χαμηλόφωνα, σε παρακαλώ, γιατί το παιδί κοιμάται.

But you could also hear variations such as:

• Σε παρακαλώ, μίλα πιο χαμηλόφωνα, γιατί το παιδί κοιμάται.
• Μίλα πιο χαμηλόφωνα γιατί το παιδί κοιμάται.

The basic meaning stays the same, but the placement can slightly change the emphasis or rhythm.

It sounds natural and reasonably polite.

By itself, the imperative Μίλα can sound direct, but σε παρακαλώ softens it. The explanation with γιατί το παιδί κοιμάται also makes the reason clear, which helps it sound considerate rather than abrupt.

So the overall tone is like:

• Please speak more softly, because the child is sleeping.

That is a very normal thing to say in Greek.