Taurus magnus in agro stat, sed agricola dicit eum mansuetum esse.

Magnus is an adjective, and it agrees with taurus in gender, number, and case.

• taurus = masculine, singular, nominative
• magnus = masculine, singular, nominative

So taurus magnus means the big bull or a big bull. In Latin, adjectives must match the nouns they describe.

Taurus is nominative singular. You can tell because it is the subject of stat.

In this clause:

• Taurus magnus = the subject
• stat = stands / is standing

So the basic structure is:

• The big bull
  • stands

That is why taurus is in the nominative case.

Because in can take either the ablative or the accusative, depending on the meaning.

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

Here the bull is already standing in the field, so this is location, not movement. Therefore Latin uses:

• in agro = in the field

If it meant into the field, Latin would use in agrum.

Agro is the ablative singular of ager, agri, meaning field.

It is ablative here because it follows in in the sense of location:

• in agro = in the field

This is a very common Latin pattern.

Because agricola belongs to the first declension, and many first-declension nouns end in -a. Most first-declension nouns are feminine, but a small group referring to jobs or roles commonly done by men are masculine.

So:

• agricola = masculine noun
• nominative singular ending = -a

This can feel strange to English speakers at first, but it is normal in Latin. Other similar masculine first-declension nouns include nauta and poeta.

Yes. Latin word order is much freer than English word order because the endings show the grammar.

So these could all mean essentially the same thing:

• Taurus magnus in agro stat
• In agro taurus magnus stat
• Magnus taurus stat in agro

The author’s chosen order may emphasize certain words or simply sound natural in context. In this sentence, the order is straightforward and easy to follow:

• subject first: Taurus magnus
• place next: in agro
• verb last: stat

That final-verb pattern is very common in Latin.

Eum is the accusative singular masculine form of is, ea, id, meaning him.

It refers back to taurus. In English, we might say:

• the farmer says that he is gentle

Latin does not normally use a that-clause here. Instead, it uses an accusative + infinitive construction:

• agricola dicit eum mansuetum esse

In that structure, the subject of the reported statement goes into the accusative, so he becomes eum.

Because Latin usually expresses indirect statement with the accusative and infinitive, often called the AcI construction.

English:

• The farmer says that the bull is gentle

Latin:

• Agricola dicit eum mansuetum esse

How it works:

• dicit = says
• eum = the subject of the reported statement, put in the accusative
• mansuetum = adjective describing eum
• esse = infinitive to be

So literally it is something like:

• the farmer says him to be gentle

That sounds awkward in normal English, but it is standard Latin grammar.

Because mansuetum agrees with eum, and eum is accusative.

Inside the indirect statement:

• eum = accusative singular masculine
• mansuetum = accusative singular masculine
• esse = infinitive

Since mansuetum describes eum, it must match it in gender, number, and case.

If this were a normal direct statement, you would expect:

• taurus mansuetus est

But in indirect statement, the subject becomes accusative:

• eum mansuetum esse

Esse is the present active infinitive of sum, meaning to be.

In an indirect statement after dicit, Latin uses the infinitive instead of a finite verb like is.

Compare:

Direct statement:

• Taurus mansuetus est = the bull is gentle

Indirect statement:

• Agricola dicit eum mansuetum esse = the farmer says that he is gentle

So esse is the infinitive form required by this construction.

Yes, in this sentence eum refers naturally to taurus.

Why?

• eum is masculine singular
• taurus is masculine singular
• it makes sense in context that the farmer is talking about the bull

Also, although agricola is grammatically masculine, it is the speaker of dicit, so eum is not likely to refer back to the farmer here. The most natural reading is:

• the farmer says the bull is gentle

Stat means stands or is standing, while est simply means is.

So:

• taurus in agro stat gives a more physical, visual idea: the bull is standing in the field
• taurus in agro est would only say that the bull is in the field

Latin often chooses a more specific verb where English might simply use is.

Sed means but.

It connects the two clauses and shows contrast:

• Taurus magnus in agro stat
• sed agricola dicit eum mansuetum esse

The contrast is something like:

• there is a big bull standing in the field, but the farmer says it is gentle

So sed is a very common coordinating conjunction.

Because Latin usually does not need a separate word like English that in this kind of sentence.

English says:

• The farmer says that the bull is gentle

Latin instead uses:

• dicit eum mansuetum esse

So the idea of English that is expressed by the whole accusative + infinitive structure, not by one separate word.