Magistra respondet unguenta ex Asia saepe magni pretii esse.

Because Latin is using an indirect statement after respondet.

After verbs like say, think, hear, reply, and similar verbs, Latin often does not use a finite verb like sunt. Instead, it uses:

• an accusative subject
• plus an infinitive

So:

• unguenta ... esse = that the perfumes ... are

In English we usually use a that-clause, but Latin prefers this accusative-and-infinitive construction.

Because in an indirect statement, the subject of the infinitive goes into the accusative.

So even though unguenta is the thing that is of great value, it is not in the nominative here. It is the subject of esse inside indirect statement, so Latin puts it in the accusative.

This is very common in Latin:

• dicit puerum venire = he says that the boy is coming
• respondet unguenta ... esse = she replies that the perfumes ... are ...

Also, unguenta is a neuter plural form, and for neuter plurals the nominative and accusative look the same. So the form itself does not change, but the grammatical role does.

Unguenta is the neuter plural of unguentum.

So it means:

• ointments
• perfumes
• unguents

depending on context.

Its form here could be either nominative plural or accusative plural, but because it is the subject of an indirect statement, we understand it as accusative plural.

Ex Asia goes with unguenta.

It tells you where the perfumes/ointments come from:

• unguenta ex Asia = perfumes from Asia

The preposition ex means out of or from, and it takes the ablative, so Asia is ablative here.

Saepe is an adverb meaning often.

It modifies the idea are of great value:

• unguenta ex Asia saepe magni pretii esse = that perfumes from Asia are often of great value

Latin word order is more flexible than English word order, so saepe does not have to stand in exactly one place. Its position here is perfectly natural.

You should not assume that a Latin adverb always goes where an English adverb would go.

Magni pretii means of great value or more literally of great price.

This is a standard Latin way of expressing value:

• magni pretii = of great value
• parvi pretii = of little value

Latin often uses the genitive of value with words like magni, parvi, tanti, nullius, and so on.

So rather than saying something like a great price, Latin says of great price/value.

Because the sentence is not saying the perfumes are a great price. It is saying the perfumes are of great value.

That idea is expressed in Latin with the genitive of value:

• magni pretii esse = to be of great value

Here:

• pretii is the genitive singular of pretium
• magni is also genitive singular, agreeing with pretii

So the phrase is built in the genitive, not in the nominative or accusative.

If you used magnum pretium, that would be a different structure and would not fit this idiom.

Because magni agrees with pretii.

• pretii is genitive singular
• pretium is a neuter noun
• so the adjective must also be genitive singular neuter

The genitive singular of magnus, magna, magnum for the neuter is magni.

So:

• magni pretii = of great value

Even though unguenta is plural, magni is not agreeing with unguenta. It is agreeing with pretii.

The main verb is respondet.

That is the verb that governs the entire sentence:

• Magistra respondet = The teacher replies
• then comes the content of the reply: unguenta ex Asia saepe magni pretii esse

So the sentence is built like this:

• main clause: Magistra respondet
• indirect statement: unguenta ex Asia saepe magni pretii esse

Not necessarily.

In English, reply often makes us expect something like she replies to the boy, but both English and Latin can leave that part unexpressed if it is unimportant or already understood.

So here:

• Magistra respondet ... = The teacher replies ...

The sentence focuses on what she says, not to whom she says it.

If Latin wanted to include the person replied to, it could do so, but it does not have to.

The basic meaning would stay the same even if the words were rearranged, as long as the forms stayed the same.

Latin uses endings more than position to show grammar, so word order is relatively flexible. Still, some positions are more natural than others:

• respondet comes early as the main verb
• esse comes at the end, which is very common for an infinitive in indirect statement
• magni pretii stays together as a phrase

So the order is natural and readable, but not the only possible one.