Discipula epistulam a matre acceptura est.

Discipula is in the nominative singular, which is the case normally used for the subject of a Latin sentence.

• discipula = the female student / schoolgirl
• It is singular, so the sentence is talking about one student.

The ending -a here is the nominative singular ending of a first-declension noun.

Epistulam is the direct object, the thing being received, so Latin puts it in the accusative case.

• epistula = letter
• epistulam = letter as a direct object

So the student is receiving the letter.

A matre means from the mother.

Here:

• a / ab = from
• matre is the ablative singular of mater (mother)

After the preposition a/ab, Latin normally uses the ablative case, so mater becomes matre.

In this sentence, a matre shows the source of the letter: the student will receive the letter from her mother.

Acceptura is the future active participle of accipio (receive).

It means something like:

• about to receive
• going to receive
• destined to receive in some contexts

Because the subject is discipula, which is feminine singular, the participle must also be feminine singular, so we get acceptura.

If the subject were masculine, it would be accepturus. If plural feminine, accepturae, and so on.

Latin forms this expression with the future active participle + a form of esse (to be).

So:

• acceptura = about to receive
• est = is

Together, acceptura est literally means is about to receive.

This is often called the future active periphrastic.

In natural English, it can often be translated simply as:

• will receive
• is going to receive
• is about to receive

depending on context.

Both can often be translated will receive, but they are not exactly the same.

• accipiet = simple future: she will receive
• acceptura est = future active periphrastic: she is going to receive / is about to receive

The periphrastic form can feel a little more vivid or purposeful. It often suggests that the action is forthcoming or on the point of happening, rather than just stating a future fact.

So the difference is not always huge in translation, but grammatically it is important.

Because acceptura is not the present participle; it is the future active participle.

Latin participles are built differently:

• Present active participle of accipio: accipiens = receiving
• Future active participle of accipio: accepturus, acceptura, accepturum = about to receive

Notice that the future participle is built from the supine stem:

• accipio
• perfect participle: acceptus
• future participle: accepturus

So acceptura is the correct feminine singular form.

Yes, Latin could use a different word order and still keep the same basic meaning, because the case endings show how the words function.

For example, these would still mean essentially the same thing:

• Discipula epistulam a matre acceptura est
• Epistulam discipula a matre acceptura est
• A matre discipula epistulam acceptura est

Latin word order is often used for emphasis, not just grammar.

This sentence in its given order is quite straightforward:

• subject first: Discipula
• object next: epistulam
• source phrase: a matre
• verb idea at the end: acceptura est

That final position for the verbal expression is very common in Latin.

Participles in Latin behave like adjectives, so they must agree with the noun they describe in:

• gender
• number
• case

Here, acceptura describes discipula, so it must match it:

• discipula = feminine
• singular
• nominative

Therefore:

• acceptura = feminine singular nominative

It agrees with discipula, not with epistulam.

In some sentences, a/ab + ablative can indeed mean by and mark the agent of a passive verb. For example:

• Epistula a matre scribitur = The letter is written by the mother

But here the verb is not passive. The student is about to receive the letter, so a matre is understood naturally as from the mother, indicating where the letter comes from.

So in this sentence, from the mother is the right interpretation.

The dictionary forms are:

• discipula, discipulae = female student, pupil
• epistula, epistulae = letter
• a / ab = from, away from
• mater, matris = mother
• accipio, accipere, accepi, acceptum = receive
• sum, esse, fui = be

Knowing these dictionary forms helps you see where the sentence forms come from:

• discipula from discipula
• epistulam from epistula
• matre from mater
• acceptura from acceptum / acceptus as part of the participle system
• est from sum

Yes. A learner should notice that the sentence does not just use a plain future verb. By choosing acceptura est, Latin gives a sense of the action as impending or anticipated.

Depending on context, the sentence might suggest:

• the student is going to receive the letter soon
• the student is about to receive the letter
• the student will receive the letter

So the Latin has a slightly more descriptive feel than a plain accipiet might have.