È un miracolo.

Because è means is, from the verb essere.

The accent is important because e without an accent usually means and.

So:

• è = is
• e = and

This is a very common distinction in written Italian.

Italian often leaves out subject pronouns when they are not needed. The verb form already tells you the person and number.

So instead of saying a separate word for it is, Italian can simply say:

• È = it is / he is / she is

In a sentence like È un miracolo, English needs it, but Italian does not.

Un is the indefinite article, meaning a or an.

So:

• un miracolo = a miracle

Italian uses un before most masculine singular nouns that begin with a consonant.

Italian has two main masculine singular indefinite articles:

• un
• uno

You use un before most consonant sounds, like m in miracolo.

You use uno before certain special consonant sounds, such as:

• z → uno zio
• s
  • consonant → uno studente
• gn → uno gnomo
• ps → uno psicologo

Since miracolo starts with a simple m, the correct form is un miracolo.

Miracolo is masculine.

A useful clue is the ending -o, which very often marks a masculine singular noun in Italian.

So:

• il miracolo = the miracle
• un miracolo = a miracle

Its plural is:

• i miracoli = the miracles

A simple pronunciation guide is:

eh oon mee-RAH-ko-lo

A few details:

• È sounds like eh
• un is pronounced roughly oon
• miracolo has the stress on RA: mee-RAH-ko-lo

The r in Italian is usually tapped or lightly rolled.

It can absolutely be used idiomatically, just like in English.

For example, you can say it literally about something amazing or unlikely:

• someone recovers unexpectedly
• something works after many problems
• a difficult plan succeeds

So È un miracolo can mean both a literal miracle and a more everyday It’s amazing that this happened.

Yes. Questo è un miracolo means This is a miracle.

The difference is:

• È un miracolo = It’s a miracle
• Questo è un miracolo = This is a miracle

Adding questo makes the subject explicit and points more directly to something specific.

For a basic statement like this, È un miracolo is the normal and natural order.

Italian word order can sometimes change for emphasis, but learners should treat this pattern as the standard one:

• È
  • noun phrase

So if you want to say It is a miracle, È un miracolo is the best choice.

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

The present tense of essere is:

• sono = I am
• sei = you are
• è = he/she/it is
• siamo = we are
• siete = you all are
• sono = they are

So in this sentence, è is the form meaning is.

Yes. The verb and article would change.

Singular:

• È un miracolo = It’s a miracle

Plural:

• Sono miracoli = They are miracles

Notice two changes:

• è becomes sono
• un disappears because plural indefinite nouns usually do not use a direct equivalent of a/an

If you wanted some miracles, you could say dei miracoli in some contexts.