Bellum finem habet, et pax in urbe manet.

Because their cases show their jobs in the sentence:

• bellum is nominative singular, which is the usual case for the subject
• finem is accusative singular, which is the usual case for the direct object

So Bellum finem habet means literally war has an end.

Finis is the dictionary form (nominative singular) of the noun meaning end or boundary.

But here the word is the direct object of habet (has), so it must be in the accusative singular:

• nominative: finis
• accusative: finem

That is why Latin uses finem.

Habet is:

• 3rd person singular
• present tense
• active voice
• indicative mood

It comes from habēre, meaning to have.

So habet means he/she/it has.
Since the subject is bellum (war), the translation is war has.

Manet is also:

• 3rd person singular
• present tense
• active voice
• indicative mood

It comes from manēre, meaning to remain, stay, or continue.

So pax in urbe manet means peace remains in the city or peace stays in the city.

Because in can take two different cases, depending on the meaning:

• in + ablative = in / on a place, showing location
• in + accusative = into / onto a place, showing motion toward

Here the idea is peace is in the city, not peace goes into the city, so Latin uses the ablative:

• nominative: urbs = city
• ablative: urbe = in the city

So in urbe means in the city.

Urbe is ablative singular of urbs, meaning city.

It is ablative because it follows in with the meaning of location.

A quick pattern:

• urbs = city
• urbem = city (as object / motion toward)
• urbe = in the city / by the city / from the city, depending on context

Here it specifically means in the city.

Classical Latin does not have articles like English the or a/an.

So:

• bellum can mean war, a war, or the war
• finem can mean an end or the end
• pax can mean peace or the peace
• urbe can mean city or the city, depending on context

English translations have to supply the article that sounds most natural.

Latin word order is more flexible than English because the endings show what each word is doing.

In English, word order is very important:

• The war has an end

In Latin, the cases already tell you that bellum is the subject and finem is the object, so the order can vary more easily.

This sentence uses a very understandable order:

• Bellum finem habet
• subject + object + verb

And then:

• et pax in urbe manet
• and + subject + prepositional phrase + verb

Latin often puts the verb near the end, but not always.

Et means and.

It simply joins the two clauses:

• Bellum finem habet
• pax in urbe manet

So the full sentence is two statements connected by et:

• War has an end, and peace remains in the city.

Yes, every Latin noun has a grammatical gender:

• bellum = neuter
• finis = usually masculine
• pax = feminine
• urbs = feminine

In this sentence, gender does not affect the basic translation very much, because there are no adjectives agreeing with these nouns. But gender is important in Latin because adjectives, pronouns, and some participles must agree with the nouns they describe.

Yes, it is a very natural way to express that idea.

Literally, it means war has an end, but in smoother English we might say:

• War comes to an end
• The war ends
• War has an ending

Latin often uses habere (to have) with a noun in ways that English may express differently.

Yes. The verb manet can be translated in several close ways depending on context:

• remains
• stays
• continues
• abides

So pax in urbe manet could be translated as:

• peace remains in the city
• peace stays in the city
• peace continues in the city

All of these capture the basic Latin idea well.