Laterculus bessalis parvus est.

The sentence has three main parts:

• laterculus = the subject
• parvus est = the main statement about the subject, is small
• bessalis = an adjective describing laterculus

So the core pattern is:

subject + adjective + predicate adjective + verb

More specifically:

• laterculus is the thing being talked about.
• bessalis describes what kind of laterculus it is.
• parvus est tells you what is being said about it.

Laterculus is nominative singular.

You can tell because:

• -us is a very common nominative singular ending for a second-declension masculine noun
• the verb est is singular, so it matches a singular subject
• the sentence makes best sense with laterculus as the thing that is small

So laterculus is the subject: the little brick / tile.

Because not all Latin adjectives belong to the same declension pattern.

• parvus is a first-and-second-declension adjective
• bessalis is a third-declension adjective

So even though both adjectives describe a masculine singular noun, they do not have to look the same.

Here they still agree with laterculus in:

• gender: masculine
• number: singular
• case: nominative

But they show that agreement with different adjective endings, because they come from different declension types.

That is why:

• parvus = masculine nominative singular
• bessalis = masculine nominative singular

Even though one ends in -us and the other in -is.

Because it is a predicate adjective with est.

After a form of to be in Latin, a predicate adjective normally agrees with the subject and stays in the nominative.

So:

• laterculus = nominative subject
• parvus = nominative adjective describing the subject through est

This is the same idea as in English:

• The brick is small

We do not make small into an object, and Latin does not either. There is no direct object here, so no accusative is needed.

They are both adjectives, but they are doing slightly different jobs.

• bessalis is an adjective directly attached to laterculus
• parvus is the adjective linked to the subject by est

So:

• laterculus bessalis = the bessal little brick / the little brick of that measure
• parvus est = is small

In traditional grammar terms:

• bessalis is attributive
• parvus is predicative

A simple way to feel the difference is:

• bessalis helps identify the noun
• parvus tells you what is being asserted about it

Because Latin word order is much freer than English word order.

In English, we usually put adjectives before the noun:

• a small brick

But in Latin, adjectives can come before or after the noun. Both are common.

So laterculus bessalis is perfectly normal Latin. The position does not automatically mean anything as rigid as it would in English.

Latin relies much more on endings than on word order to show grammar.

Because Latin often places the verb near the end of the sentence.

That does not mean it must always go there, but it is a very common pattern, especially in straightforward prose.

So:

• Laterculus bessalis parvus est
• literally arranged more like The little brick bessal small is

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

Classical Latin does not have definite and indefinite articles like English the and a/an.

So laterculus can mean, depending on context:

• a little brick
• the little brick

Latin leaves that to context.

This is very common for English speakers to notice at once, because English almost always wants some article, but Latin usually does not.

Yes. Laterculus is a diminutive form.

It is built from later meaning brick or tile, and the ending -culus adds the sense small or little.

So laterculus literally means something like:

• little brick
• small tile
• sometimes just a smaller or more specific kind of brick/tile

This is a useful pattern in Latin: diminutive endings often create nouns meaning little X.

Bessalis is a technical adjective based on bes, a Roman fractional measure meaning two-thirds.

In this kind of context, bessalis refers to a brick or tile of a particular measure, roughly two-thirds of a Roman foot.

So it is not just a random descriptive adjective like pretty or good. It is more specific and measurement-based.

That is why it may feel less familiar to a beginner than a common adjective like parvus.

Yes, often they could.

Because Latin uses endings to mark grammatical relationships, you can often change the order without changing the basic meaning. For example, forms like these would still be understandable:

• Parvus est laterculus bessalis
• Laterculus parvus bessalis est
• Bessalis laterculus parvus est

However, changing the order can change emphasis or style.

So the original sentence is not the only possible order, but it is a perfectly natural one.