Parentes pacem in domo servare volunt.

We know from the verb volunt, which means they want. The ending -nt shows a third-person plural subject, so parentes is understood as the people doing the wanting.

Also, parentes can be either nominative plural or accusative plural in form, so the verb helps us decide its role here. In this sentence, it is nominative plural, the subject.

Pacem is the accusative singular form of pax, meaning peace. It is accusative because it is the direct object of servare.

So:

• pax = peace as a subject
• pacem = peace as an object

Here, the parents want to preserve peace, so peace is being acted on.

Because Latin uses volo and its forms with an infinitive, just like English uses want + to + verb.

So:

• volunt = they want
• servare = to preserve / to keep

Together, servare volunt means they want to preserve.

Domo is ablative singular. After in, Latin uses:

• in + ablative for location: in the house, at home
• in + accusative for motion into something: into the house

So:

• in domo = in the house / at home
• in domum = into the house

Since this sentence describes where the peace is being preserved, not movement, Latin uses in domo.

Latin actually could use domi, which means at home. But in domo is also possible and means in the house or in the home.

A learner should know that domus is a somewhat irregular noun, and it has a special locative form:

• domi = at home

But in domo is still perfectly understandable and emphasizes being in the home/house.

Latin word order is more flexible than English word order because the endings show the grammatical roles of words.

Putting volunt at the end is very natural Latin. A sentence like this often builds toward the main verb at the end:

• Parentes = subject
• pacem = object
• in domo = place
• servare = infinitive
• volunt = main verb

English depends much more on word order, but Latin can move words around for style, emphasis, or rhythm.

No. Latin usually does not need to state the subject pronoun if the verb ending already shows it.

Here, volunt already means they want, so a separate they is unnecessary. The noun parentes names who they are.

In this sentence, servare means to preserve, to keep, or to maintain. It does not just mean to save in an emergency sense.

So pacem servare is a natural Latin expression for keeping peace or maintaining peace.

The sentence is built like this:

• Parentes — subject
• pacem — direct object
• in domo — prepositional phrase showing location
• servare — infinitive
• volunt — main verb

So the pattern is basically:

subject + object + place + infinitive + main verb

A very literal English order would be:

The parents peace in the home to preserve want

But natural English rearranges that as:

The parents want to preserve peace at home.