Mater dicit culcitam veterem nimis duram esse.

Because this sentence uses indirect statement, a very common Latin construction after verbs like dicit (says).

After dicit, Latin often does not use a separate word for that. Instead, it uses:

• accusative subject
  • infinitive verb

So in:

Mater dicit culcitam veterem nimis duram esse

the phrase culcitam ... esse means that the old mattress is too hard.

Even though culcitam is the logical subject of esse, Latin puts it in the accusative because that is how the construction works.

If this were a direct statement, it would be:

Culcita vetus nimis dura est.
The old mattress is too hard.

When turned into indirect statement after dicit:

• culcita → culcitam
• vetus → veterem
• dura → duram
• est → esse

For the same reason: this is an indirect statement.

After dicit, Latin usually changes the verb of the reported statement into an infinitive. So instead of saying:

• ... est = ... is

Latin says:

• ... esse = to be

In English, we often translate this with that:

• Mater dicit ... esse
  = Mother says that ... is ...

So esse is not translated literally as to be here. In context, it becomes is in natural English.

The pattern is:

• verb of saying/thinking/perceiving
• followed by accusative + infinitive

This is often called the accusative-and-infinitive construction or ACI.

Here:

• Mater = subject of dicit
• dicit = main verb
• culcitam veterem nimis duram esse = the reported statement

Inside that reported statement:

• culcitam = subject of esse (but in accusative)
• duram = predicate adjective with esse
• veterem = adjective describing culcitam
• nimis = adverb modifying duram

So the sentence contains a main clause plus a reported clause.

Because they both agree with culcitam, which is:

• feminine
• singular
• accusative

Latin adjectives must agree with the noun they describe in:

• gender
• number
• case

So:

• culcitam = feminine accusative singular
• veterem = feminine accusative singular
• duram = feminine accusative singular

Even though veterem and duram do slightly different jobs in the sentence, they still agree with the same noun.

They are both adjectives agreeing with culcitam, but they function a little differently.

• veterem is an attributive adjective: it simply describes the noun
  → the old mattress

• duram is a predicate adjective with esse
  → the mattress is hard

So the structure is roughly:

• culcitam veterem = the old mattress
• nimis duram esse = to be too hard

That is why veterem feels more tightly attached to culcitam, while duram belongs more closely with esse.

Nimis means too, overly, or excessively.

It modifies duram, so:

• nimis duram = too hard

It does not mean just very in the ordinary sense. A learner should notice the difference:

• valde dura = very hard
• nimis dura = too hard

So nimis suggests excess: harder than is acceptable or comfortable.

Because they belong to different parts of the sentence.

• Mater is the subject of the main verb dicit, so it is nominative
• culcitam is the subject of the infinitive esse inside the indirect statement, so it is accusative

So Latin is marking two different clause-level roles:

1. Mater dicit = Mother says
2. culcitam ... esse = that the mattress is ...

This is a very important pattern in Latin, because English does not mark it the same way.

Veterem comes from the adjective vetus, veteris, meaning old.

This is a third-declension adjective, so its forms can look quite different from the nominative.

Important forms include:

• nominative singular masculine/feminine/neuter: vetus
• accusative singular masculine/feminine: veterem
• genitive singular: veteris

So in the direct statement you would have:

• culcita vetus

But in this sentence, because culcitam is accusative, the adjective changes too:

• culcitam veterem

It would be:

Culcita vetus nimis dura est.

That helps show exactly what changes when Latin turns a direct statement into an indirect one.

Direct statement:

• culcita = nominative
• vetus = nominative agreeing with culcita
• dura = nominative predicate adjective
• est = finite verb

Indirect statement after dicit:

• culcitam = accusative
• veterem = accusative agreeing with culcitam
• duram = accusative predicate adjective
• esse = infinitive

This is one of the clearest ways to understand the sentence.

Yes. Latin word order is much more flexible than English word order because the endings show the grammatical relationships.

This sentence places:

• Mater first
• dicit early
• the whole indirect statement afterward
• esse at the end

That is a very normal arrangement. In particular, Latin often puts the infinitive esse at or near the end of the indirect statement.

You could rearrange the words and still keep the same basic meaning, though some orders may sound more natural or emphasize different words.

For example, Latin speakers could understand forms like:

• Mater culcitam veterem nimis duram esse dicit.
• Mater dicit nimis duram esse culcitam veterem.

But the given order is straightforward and idiomatic.

Yes, in translation there usually is.

Latin often does not use a separate word meaning that after verbs like say, think, know, and hear. Instead, it uses the accusative + infinitive construction.

So:

• Mater dicit culcitam veterem nimis duram esse

is naturally translated as:

• Mother says that the old mattress is too hard.

The word that is not written as a separate Latin word here, but the grammar expresses the same idea.

Not by itself.

The direct object of dicit, in a broader sense, is the whole reported statement:

• culcitam veterem nimis duram esse

Inside that reported statement, culcitam is the subject of esse.

So it is better not to think of culcitam alone as the ordinary direct object of dicit. It is part of a larger unit: the indirect statement.

This is one reason the construction can feel strange to English speakers at first. English usually says:

• Mother says that the old mattress is too hard

Latin compresses that into a different grammatical pattern.