Unda navem movet.

Because unda is in the nominative case, which is the case typically used for the subject of a Latin sentence.

Here, unda means wave, and it is the thing doing the action of movet (moves), so it is the subject.

Navem is in the accusative singular, the case usually used for the direct object.

The noun is navis (ship), but its accusative singular form is navem. That tells you the ship is the thing being moved, not the thing doing the moving.

So:

• unda = the wave
• navem = the ship, as the object

In Latin, word endings usually tell you that more clearly than word order does.

• unda is nominative singular → subject
• navem is accusative singular → direct object
• movet is the verb → moves

So the sentence means The wave moves the ship, not The ship moves the wave.

Movet is the third person singular present active indicative of moveo, movere, meaning to move.

That means it translates as:

• he moves
• she moves
• it moves

In this sentence, since unda is singular and means wave, movet means it moves or simply moves.

Latin usually does not have words for the or a/an.

So unda navem movet could be translated in different ways depending on context:

• The wave moves the ship
• A wave moves the ship
• The wave moves a ship
• A wave moves a ship

In a basic classroom sentence, The wave moves the ship is a very natural translation.

Yes. Latin word order is much more flexible than English word order because the endings show each word’s role.

These could all mean roughly the same thing:

• Unda navem movet
• Navem unda movet
• Movet unda navem

The basic meaning stays the same because unda is still nominative and navem is still accusative.

However, different word orders can give different emphasis.

That is a very normal Latin sentence pattern: subject – object – verb.

So:

• unda = subject
• navem = object
• movet = verb

Latin often puts the verb at the end, though it does not have to.

Unda is a first-declension noun.

Its nominative singular ends in -a, which is very common for first-declension nouns.

Navis is a third-declension noun.

That is why its accusative singular is navem, not something like navam.

So this sentence gives you two different noun patterns:

• unda, undae = wave
• navis, navis = ship

Yes. Latin moveo is the source of English words such as:

• move
• motion
• motor
• motive

That can make the verb easier to remember.

A common classroom pronunciation would be something like:

OON-da NAH-wem MO-weht

More specifically:

• unda = OON-da
• navem = NAH-wem or NAH-vem, depending on pronunciation system
• movet = MO-weht or MO-vet

In restored classical pronunciation, v is pronounced more like an English w.

Yes. Latin verbs often cover a range of meanings wider than one exact English word.

Moveo can mean:

• move
• set in motion
• stir
• affect

In this sentence, the simplest meaning is just moves, especially in a physical sense.

The dictionary forms are:

• unda, undae = wave
• navis, navis = ship
• moveo, movere, movi, motum = move

Latin dictionaries usually list nouns with the nominative singular and genitive singular, and verbs with their principal parts. That helps you identify which declension or conjugation a word belongs to.