Mater dicit naviculam sine gubernaculo bene moveri non posse.

The main verb is dicit, from dico, dicere, meaning says.

So the basic frame is:

Mater dicit ... = Mother says ...

Everything after dicit is what the mother is saying.

Mater is nominative singular, the subject of dicit.

It does not end in -a because it is a third-declension noun:

• mater = mother
• matris = of the mother

A native English speaker often learns early that many feminine nouns are first declension, but not all of them are. Mater is a very common feminine noun of the third declension.

Because Latin is using an indirect statement after dicit.

In this construction, the subject of the reported statement goes into the accusative, not the nominative. So:

• naviculam = the little boat, as the accusative subject of the indirect statement
• moveri non posse = not to be able to move / be moved

A helpful comparison:

• Direct statement: Navicula sine gubernaculo bene moveri non potest.
• Indirect statement after dicit: Mater dicit naviculam sine gubernaculo bene moveri non posse.

So navicula changes to naviculam because it becomes the subject of an infinitive construction.

It is the accusative-and-infinitive construction, often called an indirect statement.

After verbs like:

• dicit = says
• putat = thinks
• scit = knows
• audit = hears

Latin often does not use a word exactly like English that. Instead, it uses:

• an accusative subject
• plus an infinitive

So:

Mater dicit naviculam ... non posse
means
Mother says that the little boat ... cannot ...

English usually uses that, but Latin often does not.

Because Latin normally expresses this kind of reported statement with the accusative-and-infinitive construction rather than with a conjunction like English that.

So English says:

Mother says that the little boat cannot ...

But Latin says more literally:

Mother says the little boat not to be able ...

That sounds odd in English, but it is perfectly normal Latin.

Moveri is the present passive infinitive of moveo.

• movere = to move something
• moveri = to be moved

So Latin is not using the active infinitive here.

This matters because movere is usually transitive: it means to move something. But here the boat is the thing affected, so moveri fits the grammar.

Depending on context, English may translate this more naturally as:

• to be moved
• to move
• to be steered

Latin sometimes uses forms that are more passive-looking than the most natural English translation.

It means not to be able to move / to be moved.

Break it down:

• moveri = to be moved
• posse = to be able
• non posse = not to be able

Together:

• moveri posse = to be able to move / be moved
• moveri non posse = not to be able to move / be moved

Because the sentence is inside indirect statement, Latin uses the infinitive posse instead of the finite verb potest.

Because the whole reported statement after dicit is put into infinitive form.

Compare:

• Direct: navicula ... non potest
• Indirect after dicit: naviculam ... non posse

This is one of the most important patterns in Latin:

• finite verb in direct speech or direct statement
• infinitive in indirect statement

So potest becomes posse.

It negates posse, not dicit.

So the meaning is:

Mother says [the little boat cannot move well without a rudder].

It does not mean:

Mother does not say ...

If Latin wanted to negate the main verb, it would usually say:

Mater non dicit ...

Position helps here: non stands right before posse, so it naturally goes with that infinitive.

Because sine takes the ablative.

So:

• sine = without
• gubernaculo = with the ablative ending, meaning without a rudder

This is a standard preposition-and-case combination:

• sine amico = without a friend
• sine aqua = without water
• sine gubernaculo = without a rudder

Gubernaculum means rudder, and by extension it can also suggest helm or steering apparatus, depending on context.

In this sentence, sine gubernaculo means the boat lacks what is needed for proper steering, which explains why it cannot move well.

No. Naviculam comes from navicula, which is a diminutive of navis.

So it means:

• little boat
• small boat
• skiff or boatlet, depending on style

A diminutive often adds the idea of small size, and sometimes also a tone of affection or insignificance.

So navicula is not just any ship; it is specifically a small boat.

Because bene is an adverb, and it modifies the verbal idea moveri.

• bene = well
• bonam naviculam would mean a good little boat

Here Latin wants to say move well, not good boat.

So:

• bene moveri = to move well / to be moved well

That is why the adverb bene is correct.

It most naturally modifies moveri.

So the idea is:

to move well or to be moved well

The sentence is not mainly saying that the boat is good; it is saying that the boat cannot operate / move properly without a rudder.

The word order is normal and natural, but Latin word order is much more flexible than English word order.

The sentence is arranged like this:

• Mater = subject
• dicit = main verb
• naviculam = accusative subject of the indirect statement
• sine gubernaculo = prepositional phrase
• bene moveri non posse = infinitive phrase

Latin often places important verbal material near the end, so ending with moveri non posse is very natural.

English depends heavily on word order to show grammar. Latin depends much more on endings, so the order can move around more freely without changing the basic meaning.

A direct version would be:

Navicula sine gubernaculo bene moveri non potest.

Then after Mater dicit, Latin changes it into indirect statement:

• navicula → naviculam
• non potest → non posse

So:

• Direct: The little boat cannot move well without a rudder.
• Indirect: Mother says that the little boat cannot move well without a rudder.

Grammatically, moveri is literally to be moved.

But in context, English may prefer a smoother translation such as:

• to move
• to sail
• to be steered

A learner should know both levels:

• Formally/literally: passive infinitive
• Naturally in context: a boat cannot move or be steered well without a rudder

That kind of difference between strict form and idiomatic translation is very common in Latin.