Mercatrix videt carinam aquam recipere et metuit naufragium.

Mercatrix is the feminine form meaning female merchant or businesswoman.
The masculine form is mercator.

So:

• mercator = a male merchant
• mercatrix = a female merchant

A native English speaker may notice that English usually just says merchant for either sex, but Latin often marks this distinction more clearly.

Because carinam is the subject of the infinitive recipere in an accusative-and-infinitive construction.

After verbs like videt (she sees), Latin can say:

• videt carinam aquam recipere

Literally, this is something like:

• she sees the hull taking in water

Here:

• carinam = the thing seen doing the action
• recipere = the action being done

So even though carinam is the logical subject of recipere, it appears in the accusative, not the nominative, because of this construction.

Because after videt, Latin often uses an infinitive construction rather than a full finite clause.

So instead of saying something like:

• The merchant sees that the hull is taking in water

Latin says:

• mercatrix videt carinam aquam recipere

That is:

• videt = the main finite verb, sees
• recipere = infinitive, to take in / taking in

This is a very common Latin pattern after verbs of seeing, knowing, saying, hearing, and thinking.

Because aquam is the direct object of recipere.

So the structure is:

• carinam = the hull, the thing doing the taking in
• aquam = water, the thing being taken in
• recipere = to take in / receive

Even though both words are accusative, they do different jobs:

• carinam = accusative subject of the infinitive
• aquam = direct object of the infinitive

This is one of the things that can feel unusual to English speakers at first.

Literally, recipere often means to receive, take back, or take in.

In this sentence, with aquam, it means:

• to take in water
• to admit water
• to leak

So carinam aquam recipere means that the hull is letting water in or taking on water.

This is a good example of how the most natural English translation is not always the most literal one.

Originally, yes: carina means keel.
But in context it can also refer more broadly to the hull or even the ship.

In this sentence, hull is probably the best sense, because a hull can take in water.
So although a dictionary may first give keel, the contextual meaning is wider here.

Because it is the direct object of metuit.

• metuit = she fears
• naufragium = shipwreck

Latin commonly uses the thing feared as a direct object:

• metuit naufragium = she fears shipwreck

English can do the same thing, so this part is relatively straightforward.

Metuit is:

• 3rd person singular
• present tense
• from metuere = to fear

So it means:

• he fears
• she fears
• it fears

Here, because the subject is mercatrix, it means she fears.

Because Latin often does not use a separate word meaning that in this kind of clause.

English says:

• She sees that the hull is taking in water

Latin instead uses:

• accusative + infinitive

So:

• carinam = accusative
• recipere = infinitive

This construction does the job that that-clauses often do in English.

Yes. That is a very good English rendering.

Possible translations include:

• The merchant sees the hull taking in water and fears shipwreck.
• The merchant sees that the hull is taking in water and fears shipwreck.
• The female merchant sees the ship taking on water and fears shipwreck.

All of these reflect the Latin well. The best choice depends on how literal or natural you want the English to sound.

Latin word order is more flexible than English word order because Latin uses endings to show grammatical function.

Here:

• mercatrix = subject
• videt = main verb
• carinam = accusative subject of infinitive
• aquam = object of infinitive
• recipere = infinitive
• et metuit naufragium = and fears shipwreck

English relies heavily on order to show who is doing what. Latin relies much more on case endings and verb forms. So the order may feel unusual, but the endings make the structure clear.

Because the sentence describes what is happening right now in the scene:

• she sees
• she fears

The present infinitive recipere also fits this ongoing situation: the hull is taking in water at that moment.

So the whole sentence presents a vivid present-time picture.

Yes.

The subject mercatrix applies to both verbs:

• mercatrix videt ...
• (mercatrix) metuit naufragium

Latin often omits a repeated subject when it is already clear. So et connects two actions of the same person:

• she sees ...
• and she fears ...

No, not in standard grammar.

It must be carinam, not carina, because in this construction the subject of the infinitive is put in the accusative.

So:

• correct: videt carinam aquam recipere
• not correct here: videt carina aquam recipere

An English speaker may expect the logical subject to stay in the nominative, but Latin does not do that in this pattern.

Not in normal English. Although recipere is related to receive, the natural sense here is take in or take on.

So a beginner should not translate too mechanically as:

• the hull receives water

That is understandable, but not idiomatic English. Better:

• the hull is taking in water
• the hull is taking on water
• the hull is leaking

It breaks down like this:

• Mercatrix = subject
• videt = main verb
• carinam aquam recipere = what she sees
• et = and
• metuit naufragium = second main clause

So the pattern is:

• [Subject] + [main verb] + [accusative + infinitive] + et + [second verb + object]

That is a very useful structure to recognize in Latin.