Pars supera muri alta est.

The sentence breaks down like this:

• pars = the subject, part
• supera = an adjective describing pars, upper
• muri = of the wall
• alta = another adjective describing pars, high
• est = is

So the core pattern is:

[subject] + [describing words] + [linking verb]

A very literal unpacking would be:

part upper of-the-wall high is

Latin often puts words in an order that sounds unusual in English, but the endings show how the pieces fit together.

Here muri is genitive singular, meaning of the wall.

Latin often uses the genitive after words like pars to show the whole that something is a part of:

• pars muri = part of the wall
• pars urbis = part of the city
• pars exercitus = part of the army

So muri is not the subject here. It depends on pars and tells you part of what.

Yes, the form muri can look ambiguous at first, because it can be:

• genitive singular = of the wall
• nominative plural = walls

But in this sentence it must be genitive singular, because pars naturally takes a genitive:

• pars muri = part of the wall

If muri were nominative plural, the sentence would not fit together nearly as well.

Because they both agree with pars.

Latin adjectives must agree with the noun they describe in:

• gender
• number
• case

pars is feminine singular nominative, so adjectives describing it must also be feminine singular nominative:

• supera
• alta

That is why both adjectives have -a endings here.

The main clue is agreement.

• pars is feminine
• murus is masculine

Since supera and alta are feminine forms, they match pars, not muri.

If those adjectives were describing murus, you would expect masculine forms instead.

So even though muri stands between the other words, the endings make the relationships clear.

They are related in idea, but they do different jobs.

• supera = upper, the part that is above
• alta = high, tall

So:

• supera tells you which part of the wall
• alta tells you what that part is like

In other words, supera identifies the section, while alta gives a quality of that section.

Because Latin has no articles like English the or a/an.

So:

• pars can mean a part or the part
• muri can mean of a wall or of the wall

You decide from context which English article to use when translating.

Latin word order is much more flexible than English word order.

English relies heavily on position:

• The upper part of the wall is high

Latin relies much more on endings:

• pars shows the subject
• muri shows a genitive relationship
• supera and alta agree with pars

Because of that, Latin can move words around for emphasis, rhythm, or style.

A learner might expect something like:

• supera pars muri alta est

But Pars supera muri alta est is still understandable because the endings tell you how the words connect.

Also, putting est at the end is very common in Latin.

Yes. supera is the feminine singular form of superus, meaning upper or above.

It agrees correctly with pars, so grammatically it works well.

That said, many learners more often meet superior for upper in textbook Latin, so a phrase like pars superior muri may look more familiar. But supera itself is a real and correct adjective form here.