Discipula verba difficilia in margine ponit, ut auctorem facilius intellegat.

Because discipula is the subject of the main verb ponit. It means the female student / schoolgirl, and the nominative is the case used for the doer of the action.

• discipula = nominative singular
• It answers the question Who puts the words in the margin?
• Answer: the student

Because verba is the plural of verbum, which is a neuter noun meaning word.

• verbum = singular, word
• verba = plural, words

The adjective difficilia matches verba in gender, number, and case:

• verba = neuter plural accusative
• difficilia = neuter plural accusative

Together they mean difficult words. They are accusative because they are the direct object of ponit.

Because here in means in/on in a stationary sense, not motion toward somewhere.

Latin often uses:

• in + ablative = in, on a place
• in + accusative = into, onto a place

So:

• in margine = in/on the margin
• If it meant movement into the margin, Latin would use the accusative instead

Here the words are being written or placed in the margin, so the ablative is correct.

Literally, ponit means puts or places. In this sentence, a more natural English translation might be:

• writes down
• notes
• puts in the margin

So Latin uses a very basic verb, ponere (to put/place), where English might prefer a more specific expression.

The comma separates the main clause from the subordinate clause.

Main clause:

• Discipula verba difficilia in margine ponit
• The student puts difficult words in the margin

Subordinate clause:

• ut auctorem facilius intellegat
• so that she may understand the author more easily

In Latin texts, punctuation can vary by editor, but in teaching materials a comma before ut is very common because it clearly marks the start of the purpose clause.

Here ut means so that or in order that. It introduces a purpose clause.

So the sentence structure is:

• main action: the student writes difficult words in the margin
• purpose: so that she may understand the author more easily

This is one of the most common uses of ut in Latin.

Because it is in a purpose clause introduced by ut.

A very common Latin pattern is:

• ut + subjunctive = so that / in order that

So:

• ut ... intellegat = so that she may understand

This does not mean the action is doubtful. In purpose clauses, the subjunctive is simply the normal grammatical form Latin uses.

Because auctorem is the direct object of intellegat.

The verb intellegere means to understand, and the person or thing understood goes in the accusative.

So:

• intellegit auctorem = she understands the author
• auctorem = accusative singular of auctor

Facilius is the comparative adverb, meaning more easily.

• facile = easily
• facilius = more easily

So the sentence means not just so that she understands the author easily, but so that she understands the author more easily.

This suggests that writing the difficult words in the margin helps her understand better than before.

The ending of the verb tells us.

• intellegat is third person singular
• So it means he/she/it may understand

Since the subject of the main clause is discipula, we naturally understand the same person here:

• the student puts... so that she may understand...

Latin often leaves subject pronouns unstated because the verb ending already gives the person and number.

Yes. Latin word order is flexible, but this sentence is quite natural.

A rough breakdown:

• Discipula = subject
• verba difficilia = direct object
• in margine = place
• ponit = main verb
• ut auctorem facilius intellegat = purpose clause

Latin often puts the main verb near the end of its clause, and that is what happens with ponit. The subordinate verb intellegat also comes at the end of its clause, which is very common.

Yes. In English, both in the margin and on the margin can be natural, depending on context and style.

Latin in margine can cover that idea without needing to distinguish very sharply between in and on the way English sometimes does. In this sentence, either translation would be reasonable:

• in the margin
• on the margin

But in the margin is probably the most idiomatic English here.

Because Latin usually expresses purpose with a finite verb in a purpose clause, not with an infinitive the way English often does.

English says:

• She writes the words in the margin to understand the author more easily

Latin prefers:

• She writes the words in the margin so that she may understand the author more easily

So instead of an infinitive, Latin uses:

• ut + subjunctive

That is one of the most important differences between English and Latin sentence structure.