Ci impegniamo a finire il progetto.

Italian often drops subject pronouns when they are not needed. The verb ending in impegniamo already tells you the subject is we.

• (Noi) ci impegniamo = We commit ourselves / We undertake
• Adding noi is possible, but it is usually only for emphasis or contrast:
  • Noi ci impegniamo, loro no. = We are committing ourselves, they aren’t.

Here, ci is a reflexive pronoun meaning ourselves. It goes with the verb impegnarsi, which is the reflexive form of impegnare.

So:

• ci impegniamo literally = we commit ourselves
• more natural English = we commit to, we undertake, or we pledge

In this sentence, ci does not mean there or to us. It is part of the reflexive verb.

Yes. The dictionary form here is impegnarsi.

That means the verb is normally used with a reflexive pronoun:

• mi impegno = I commit myself
• ti impegni = you commit yourself
• si impegna = he/she commits himself/herself
• ci impegniamo = we commit ourselves
• vi impegnate = you commit yourselves
• si impegnano = they commit themselves

In many contexts, Italian prefers the reflexive form where English would simply say to commit or to make an effort.

Impegniamo is the present indicative, first person plural.

So it can mean:

• we commit ourselves
• we are committing ourselves
• depending on context, even we commit in a formal statement

Italian present tense often covers both the simple present and the present continuous sense of English.

Because it comes from impegnarsi, and this is the noi form in the present tense.

Conjugation:

• io mi impegno
• tu ti impegni
• lui/lei si impegna
• noi ci impegniamo
• voi vi impegnate
• loro si impegnano

The -iamo ending is the normal present-tense ending for noi with -are verbs.

Because impegnarsi is commonly followed by a + infinitive when it means to commit oneself to doing something.

So:

• impegnarsi a fare qualcosa = to commit oneself to doing something

Examples:

• Mi impegno a studiare di più. = I commit to studying more.
• Ci impegniamo a finire il progetto. = We commit to finishing the project.

You cannot normally replace that a with di here.

After impegnarsi a, Italian uses another verb in the infinitive to express the action being committed to.

Structure:

• ci impegniamo = main verb
• a finire = infinitive phrase showing what we commit to doing

This is similar to English:

• We commit to finish / We commit to finishing

Italian uses a + infinitive here.

No, that would not be correct in standard Italian.

Because the intended verb is impegnarsi, the reflexive pronoun is required:

• Ci impegniamo a finire il progetto. ✓
• Impegniamo a finire il progetto. ✗

Without the reflexive pronoun, you would be using impegnare, which is a different structure and meaning.

They are related, but they are used differently.

• impegnare = to engage, occupy, commit something/someone
• impegnarsi = to commit oneself, make an effort, undertake

Examples:

• Il lavoro mi impegna molto. = Work occupies me a lot.
• Mi impegno nello studio. = I apply myself to studying.
• Mi impegno a finire il progetto. = I commit to finishing the project.

In your sentence, the reflexive form is the correct one because the subject is committing itself.

Italian uses definite articles much more often than English. If you are talking about a specific project already known from the context, il progetto is natural.

• finire il progetto = finish the project

If you said finire un progetto, it would mean finish a project, which is less specific.

So il tells us this is a particular project, not just any project.

Yes, depending on context, ci impegniamo a finire il progetto can suggest either:

• we commit to finishing the project
• we make a serious effort to finish the project

Impegnarsi often has both ideas: commitment and effort. In a formal or institutional statement, it often sounds like we undertake or we pledge. In everyday use, it can also mean we are trying hard.

Yes, but it is not exactly the same.

• Ci impegniamo a finire il progetto = we commit ourselves / we undertake / we pledge to finish the project
• Promettiamo di finire il progetto = we promise to finish the project

Promettere focuses more on making a promise.
Impegnarsi focuses more on taking responsibility or making a commitment.

Also notice the different preposition pattern:

• impegnarsi a + infinitive
• promettere di + infinitive

No, not after impegnarsi in this meaning.

You need:

• impegnarsi a fare qualcosa

So:

• Ci impegniamo a finire il progetto. ✓
• Ci impegniamo per finire il progetto. ✗ in this structure

Per can appear in other kinds of sentences, but it is not the normal complement after impegnarsi when followed by an infinitive.

A rough pronunciation guide is:

• ci = chee
• impegniamo ≈ eem-peh-NYAH-mo

A key point is gn, which in Italian makes the sound ny as in canyon.

So impegniamo is not pronounced with a hard g like in English ignore. The middle part sounds like peh-NYA.

The normal neutral order is:

• Ci impegniamo a finire il progetto.

But Italian word order is somewhat flexible for emphasis. For example:

• A finire il progetto ci impegniamo noi.
  This puts emphasis on we.
• Il progetto ci impegniamo a finirlo entro domani.
  This is possible in a more marked structure.

For learners, the standard order is the best one to use first:

• Ci impegniamo a finire il progetto.