Serva per scalas in atrium descendit.

Serva is the nominative singular of serva, -ae, meaning female slave, slave girl, or sometimes maidservant, depending on context.

It is the subject because:

• it is in the nominative case
• the verb descendit is third person singular, so it matches a singular subject

So serva = the slave girl / the maid as the one doing the action.

Latin normally has no articles. That means serva can mean:

• a slave girl
• the slave girl

and atrium can mean:

• an atrium
• the atrium

You decide from context which English article sounds right.

Yes. Latin often uses scalae in the plural to mean a staircase or stairs, much like English stairs is usually plural in form.

So:

• scala = a ladder, staircase step, or singular stair in some contexts
• scalae = stairs / staircase

Here per scalas is the normal way to say down the stairs or by way of the staircase.

Because per takes the accusative.

So:

• per scalas = through / along / by way of the stairs

This is a standard prepositional phrase:

• per
  • accusative

Even though English says down the stairs, Latin uses per to show the path taken.

It can. The difference is:

• in + accusative = into, showing motion toward/into
• in + ablative = in / on, showing location

So here:

• in atrium = into the atrium

If it meant in the atrium as a location, it would be:

• in atriō

This is one of the most important uses of Latin cases with prepositions.

They do both relate to movement, but they answer different questions:

• per scalas = by what route? / along what path?
• in atrium = to what destination?

So the sentence gives both:

• the route: down the stairs
• the endpoint: into the atrium

That is why both phrases are useful and not redundant.

Latin word order is much more flexible than English word order because the endings show each word’s role.

Putting the verb at the end is very common in Latin, especially in straightforward narrative prose. So:

• Serva per scalas in atrium descendit

is a perfectly natural Latin arrangement.

English usually needs a stricter order:

• The slave girl goes down the stairs into the atrium

But Latin can move parts around for emphasis without changing the basic meaning.

Descendit is third person singular active indicative from descendere, meaning to go down, to descend.

So grammatically it means:

• he goes down
• she goes down
• it goes down

Since the subject is serva, the sense is she goes down.

Latin finite verbs show person and number, but not usually gender.

So descendit by itself means:

• he/she/it goes down

The gender comes from the subject:

• serva is feminine

Therefore the natural English translation is she goes down.

Yes, in ordinary spelling descendit can be ambiguous. It can represent either:

• present: goes down / is going down
• perfect: went down / has gone down

In a real text, the context tells you which is meant. In a beginner sentence like this, the provided meaning or the lesson focus usually makes the intended tense clear.

Because the verb ending already tells you there is a third-person singular subject, and the noun serva names that subject clearly.

Latin often leaves out subject pronouns unless they are needed for:

• emphasis
• contrast
• clarity

So serva descendit is more natural than adding an unnecessary ea.

A simple way to break it down is:

• Serva = subject
• per scalas = path or route
• in atrium = destination
• descendit = verb

So the sentence is built like this:

[subject] + [route] + [destination] + [verb]

That makes it a useful example of how Latin can pack a lot of information into cases and prepositional phrases.