Lucia dicit se scripturam aviae melius intellegere quam scripturam scribae celeris.

Because this sentence uses indirect statement after dicit.

In a direct statement, Lucia would say something like:

Ego scripturam aviae melius intellego quam scripturam scribae celeris.

But after dicit (says), Latin normally changes the subject of the reported statement into the accusative. So ego becomes se.

Here se refers back to Lucia, the subject of dicit. It is not especially emphatic herself here; it simply means that she.

For the same reason: Latin commonly reports what someone says, thinks, knows, etc. with an accusative + infinitive construction.

So:

• Lucia dicit = Lucia says
• se ... intellegere = that she understands ...

This is one of the most important Latin patterns to learn. English often uses that, but Latin often uses an infinitive instead.

A direct version would be:

Ego scripturam aviae melius intellego quam scripturam scribae celeris.

Then, when reported after Lucia dicit:

• ego becomes se
• intellego becomes intellegere

So the indirect statement is:

Lucia dicit se scripturam aviae melius intellegere quam scripturam scribae celeris.

Scripturam is accusative singular.

It is the direct object of intellegere. In other words, it is the thing Lucia understands.

So:

• scripturam aviae = the grandmother’s writing/handwriting
• scripturam scribae celeris = the quick scribe’s writing/handwriting

Both phrases are objects of the idea of understanding.

Aviae is genitive singular, meaning of the grandmother or more naturally the grandmother’s.

So scripturam aviae means the grandmother’s writing.

A native English speaker often expects possession to be shown by word order, but Latin usually shows it by case ending instead.

Because of the syntax and the parallel with aviae.

The sentence has:

• scripturam aviae
• quam scripturam scribae celeris

So the second phrase clearly matches the first one in structure. Just as aviae means of the grandmother, scribae celeris means of the quick scribe.

A dative meaning would not fit the sentence well here. Lucia is not understanding something for the scribe or to the scribe; she is understanding the scribe’s writing.

Because celeris agrees with scribae, not with scripturam.

Here:

• scribae = genitive singular
• celeris = genitive singular

So scribae celeris means of the quick scribe.

If the adjective described scripturam, it would need to be accusative singular feminine, so it would be celerem.

This is a very common Latin-reading skill: an adjective matches the noun it describes in gender, number, and case, not necessarily the nearest English word you might expect.

It describes scribae.

We know this because of agreement:

• scripturam is accusative singular feminine
• scribae is genitive singular
• celeris is genitive singular

Since celeris matches scribae, it goes with scribae.

So the phrase means the writing of the quick scribe, not the quick writing of the scribe.

Because melius is an adverb, while melior is an adjective.

Here it modifies intellegere:

• intellegere = to understand
• melius intellegere = to understand better

If Latin wanted to describe a noun as better, then melior would be used. But here the sentence is describing how Lucia understands, so the adverb melius is correct.

The comparison is between two kinds of writing:

• scripturam aviae
• scripturam scribae celeris

So the sense is that Lucia says she understands her grandmother’s writing better than the quick scribe’s writing.

The word melius gives the idea of better, and quam introduces the second item in the comparison.

It is repeated for clarity.

Latin can sometimes leave out a repeated word if the meaning is obvious, but repeating scripturam makes the comparison very clear:

• scripturam aviae
• quam scripturam scribae celeris

This helps the reader see immediately that Lucia is comparing one handwriting with another handwriting, not comparing people.

Because Latin word order is much more flexible than English word order. Latin relies mainly on endings, not position, to show how words function.

So even though the order may feel unusual to an English speaker, the endings tell you what each word is doing:

• Lucia = subject of dicit
• se = subject of the indirect statement
• scripturam = object of intellegere
• aviae / scribae celeris = genitives depending on scripturam
• melius = adverb modifying intellegere

A very literal English order would sound unnatural, but the Latin is perfectly normal.

Intellegere is a present infinitive.

In indirect statement, the present infinitive usually shows action happening at the same time as the main verb. So:

• Lucia dicit = Lucia says
• se ... intellegere = that she understands

So the sense is present: she says that she understands it better now, not that she understood it earlier or will understand it later.