Mater in atrio hospitem exspectat, quia pluvia frigida cadit.

Because in can take different cases depending on the meaning.

• in + ablative = in / on a place, showing location
• in + accusative = into / onto a place, showing motion toward it

Here the mother is waiting in the courtyard, not moving into it, so Latin uses the ablative:

• atrium = courtyard, hall
• atrio = in the courtyard

So in atrio means in the courtyard.

Hospitem is the accusative singular of hospes, meaning guest.

The verb exspectat means is waiting for / awaits, and the person being waited for is treated as the direct object in Latin. Direct objects normally go in the accusative case.

So:

• hospes = guest
• hospitem = the guest (as object)

That is why Latin says hospitem exspectat.

Latin word order is much freer than English word order because Latin shows grammatical function mainly through endings, not just position.

So Latin can move words around for emphasis or style. In this sentence:

• Mater = subject
• hospitem = object
• exspectat = verb

Even if the order changes, the endings still show who is doing what.

For example, these could all mean roughly the same thing:

• Mater in atrio hospitem exspectat
• Hospitem mater in atrio exspectat
• In atrio mater hospitem exspectat

The version given is a very natural Latin order. It saves the verb for the end, which is common in Latin.

Classical Latin does not have articles like English the or a/an.

So:

• mater can mean mother, the mother, or sometimes a mother
• hospitem can mean a guest or the guest

You figure out the most natural meaning from context. That is why Latin can look shorter than English.

Because mater is the subject of the sentence, so it is in the nominative case.

Latin uses:

• nominative for the subject
• accusative for the direct object

Here:

• mater = the mother, the one doing the waiting
• hospitem = the guest, the one being waited for

So mater must stay in the nominative.

Exspectat is:

• 3rd person singular
• present tense
• active voice
• from the verb exspectare = to wait for, expect

So it means:

• she waits for
• she is waiting for
• he/she/it waits for

Because the subject is mater, we understand it as she is waiting for.

Different languages build verbs differently.

In English, wait usually needs the preposition for:

• She waits for the guest

But Latin exspectare directly takes an object in the accusative:

• hospitem exspectat

So a very literal word-for-word comparison would be something like she awaits the guest, even though natural English usually says she is waiting for the guest.

Quia means because and introduces a clause giving a reason.

So:

• quia pluvia frigida cadit = because cold rain is falling

It explains why the mother is waiting in the courtyard.

Other Latin words can also introduce causal clauses, but quia is one of the most common and straightforward ones for beginners.

Because pluvia frigida is the subject of the clause, not the object.

In quia pluvia frigida cadit:

• pluvia = rain
• frigida = cold
• cadit = falls / is falling

Since pluvia is the subject, it is in the nominative singular, and the adjective frigida must agree with it:

• feminine
• singular
• nominative

If it were a direct object, then you would expect an accusative form such as frigidam pluviam.

Because frigida agrees with pluvia.

Adjectives in Latin must agree with the nouns they describe in:

• gender
• number
• case

Here:

• pluvia is feminine
• singular
• nominative

So the adjective must also be:

• feminine
• singular
• nominative

That gives frigida.

Yes. Cadit literally means falls from cadere.

Latin often expresses weather in ways that sound a little different from English. So:

• pluvia cadit = rain falls
• natural English: it is raining or rain is falling

This is a normal Latin way to describe rain.

Yes. Latin can also use pluit, meaning it is raining.

So a sentence like this could be expressed differently, for example:

• quia pluit = because it is raining

But quia pluvia frigida cadit is perfectly good Latin and adds more detail, since it specifically says cold rain is falling.

Because it has everything needed for a clause:

• a subject: pluvia frigida
• a verb: cadit

So after quia, Latin gives a complete idea:

• because cold rain is falling

This is not just a phrase; it is a full subordinate clause.

Not by itself.

Mater just means mother or the mother. Latin does not automatically include my unless the context makes that obvious or a possessive is added, such as:

• mater mea = my mother

So in this sentence, mater simply means the mother unless the wider context suggests otherwise.

A simple classroom pronunciation would be roughly:

MAH-ter in AH-tree-oh HOS-pi-tem eks-SPEK-tat, KWI-ah PLOO-wi-ah frih-GIH-da KAH-dit

A few helpful points:

• c is always hard, like k
• v in restored classical pronunciation sounds like w
• qu sounds like kw
• ae would sound like eye, though this sentence does not contain it

So quia is often pronounced roughly kwi-a, and pluvia roughly plu-wi-a in classical pronunciation.