Mater et filia mane e villa proficiscuntur.

Because the subject is mater et filia — mother and daughter — which is a compound subject made of two people joined by et (and). In Latin, just as in English, a compound subject normally takes a plural verb.

So:

• mater = mother
• filia = daughter
• mater et filia = mother and daughter
• proficiscuntur = they set out / they depart

The -ntur ending here is 3rd person plural.

Because proficiscor is a deponent verb.

A deponent verb:

• has passive forms
• but an active meaning

So proficiscuntur looks like a passive form because of the ending -ntur, but it means they set out or they depart, not they are set out.

This is very common in Latin, and it often confuses beginners at first. The dictionary form is:

• proficiscor = I set out, depart
• proficisci = to set out, depart

So when you see proficiscuntur, think:

• form: passive-looking
• meaning: active

Proficiscor is a 3rd-conjugation deponent verb.

Its main parts are commonly given as:

• proficiscor
• proficisci
• profectus sum

That means:

• present: proficiscor = I set out
• infinitive: proficisci = to set out
• perfect: profectus sum = I set out / I have set out

In your sentence, proficiscuntur is the present tense, so it means they are setting out or simply they set out / depart depending on context.

Because mater is not first declension. It is a 3rd-declension noun.

Its basic forms are:

• mater = nominative singular
• matris = genitive singular

Even though it refers to a female person, it does not follow the first declension. Latin grammatical gender and declension pattern do not always line up in the way an English speaker might expect.

In this sentence, mater is in the nominative singular because it is one part of the subject.

Filia is the nominative singular form of a first-declension noun:

• filia = daughter
• filiae = of the daughter / to the daughter / daughters, depending on context

Here it is nominative singular because it is the second part of the subject:

• mater et filia = mother and daughter

Even though the whole subject is plural in meaning, each noun is individually singular.

They are both in the nominative case.

The nominative is the case typically used for the subject of the sentence — the person or thing doing the action.

Here, the action is setting out, and the ones doing it are:

• mater
• filia

So both appear in the nominative.

Mane here is an adverb meaning in the morning or simply early in the morning.

It tells you when the action happens:

• Mater et filia mane e villa proficiscuntur.
• Mother and daughter set out in the morning.

A beginner might wonder whether mane is a noun form, but in this sentence it is best understood as a fixed adverb of time.

Because Latin uses the preposition e (or ex) to mean out of or from in the sense of coming from inside something.

So:

• villa = villa / country house
• e villa = out of the villa / from the villa

Without the preposition, the meaning would be different and much less clear.

Because the preposition e takes the ablative case.

So the pattern is:

• e
  • ablative = out of / from

Since villa is a first-declension noun, its ablative singular is also villa.

That means:

• nominative singular: villa
• ablative singular: villa

They look the same, but the role in the sentence tells you this one is ablative: it follows e.

They mean the same thing: out of or from.

Latin has both e and ex as forms of the same preposition. In practice:

• ex is often used before vowels
• e is often used before consonants

So e villa is perfectly normal.

You may also see ex urbe (out of the city), for example.

Because e/ex and ab are not exactly the same.

• e/ex means out of, from within
• ab means from, away from, by and often suggests movement away from the outside or vicinity rather than from inside

So if someone departs from inside the house/villa, e villa is the natural choice.

A rough contrast would be:

• e villa = out of the villa
• a villa / ab villa = away from the villa

Because Latin word order is much more flexible than English word order.

English depends heavily on word order to show who is doing what. Latin depends much more on:

• case endings
• verb endings

That means the sentence can often be rearranged without changing the basic meaning.

This order:

• Mater et filia mane e villa proficiscuntur

is natural and clear, but Latin could move parts around for emphasis, for example:

• Mane mater et filia e villa proficiscuntur
• E villa mater et filia mane proficiscuntur

All of these still mean essentially the same thing, though the emphasis may shift slightly.

Because putting the verb near the end is very common in Latin prose.

It is not a strict rule, but it is a frequent and natural pattern. Latin often likes to present:

1. the subject
2. other details such as time or place
3. the verb last

So this sentence follows a very typical Latin structure:

• Mater et filia = subject
• mane = time
• e villa = place/source
• proficiscuntur = verb

No. Classical Latin has no definite article like English the, and no indefinite article like English a/an.

So:

• mater can mean mother or the mother
• filia can mean daughter or the daughter
• villa can mean villa, a villa, or the villa

The context tells you which is most natural in English.

Yes, depending on context.

Because Latin has no articles, mater et filia by itself does not force one English choice. It could be translated as:

• mother and daughter
• the mother and daughter
• a mother and daughter

Usually the surrounding passage makes the intended meaning obvious.

Mostly style and emphasis.

Latin often places adverbs of time fairly early in the sentence, so mane naturally appears before the phrase e villa.

The order gives a smooth progression:

• who? mater et filia
• when? mane
• from where? e villa
• what do they do? proficiscuntur

But Latin could change this order if the author wanted to emphasize the place instead of the time.

Yes, often it can.

Proficiscor commonly means:

• set out
• depart
• start off
• sometimes simply leave

The exact English wording depends on context and style. If the sentence is about beginning a journey, set out is often the best choice. If the context is simpler, leave may sound more natural in English.

Because the verb ending already tells you the person and number.

In proficiscuntur, the ending shows 3rd person plural = they.

So Latin does not need to add ei, eae, or another pronoun unless there is a special reason for emphasis or contrast.

In other words, Latin can say simply:

• proficiscuntur = they set out

And if the subject nouns are already present, that is more than enough.