Agricola in agris multum laborat, sed filius in horto ludit.

In Latin, declension and natural gender are not the same thing.

Agricola is a first-declension noun, so it has first-declension endings, but it is masculine in meaning and grammar because it refers to a man: farmer.

This is not unusual in Latin. Some other first-declension masculine nouns are:

• poēta = poet
• nauta = sailor

So agricola looks like many feminine first-declension nouns, but it is masculine.

Because here in means in/on/among a place, not into a place.

With in, Latin uses:

• ablative for location: in agris = in the fields, in horto = in the garden
• accusative for motion into: in agros = into the fields, in hortum = into the garden

So in this sentence, the farmer and the son are already there, so Latin uses the ablative.

Both are ablative singular/plural forms used with the preposition in.

More specifically:

• agris = ablative plural of ager (field)
• horto = ablative singular of hortus (garden)

They are ablative because in here expresses location.

That is simply what the sentence says:

• in agris = in the fields
• in horto = in the garden

Latin often uses the plural fields where English might also say the fields. There is no grammatical problem with having one plural place and one singular place. It just reflects the meaning.

Here multum is being used adverbially, so it means much, a lot, or greatly.

So:

• multum laborat = he works a lot / he works hard

Although multum is originally a form of the adjective multus, -a, -um (much/many), Latin often uses the neuter singular accusative of adjectives as an adverb.

So here it is not describing a noun. It is modifying the verb laborat.

Because laborat is:

• third person singular
• present tense
• active voice
• indicative mood

The ending -at tells you he/she/it ...s.

So:

• laborat = he works / she works / it works

In this sentence, the subject is agricola, so we translate it as the farmer works.

The same pattern appears in:

• ludit = he/she plays, but from a different conjugation, so the ending is -it, not -at

Latin verb endings usually make subject pronouns unnecessary.

For example:

• laborat already means he/she/it works
• ludit already means he/she/it plays

Then the nouns in the nominative case tell you who the subject is:

• agricola is the subject of laborat
• filius is the subject of ludit

So Latin does not need to say is (he) here, because the verb form already gives that information.

Because filius is in the nominative singular, which is the usual case for the subject.

The second clause is:

• sed filius in horto ludit

Here:

• filius = subject, the son
• in horto = where he is playing
• ludit = plays

So the structure is very similar to the first clause:

• Agricola ... laborat
• filius ... ludit

Sed means but.

It connects the two clauses and shows a contrast:

• the farmer is working
• but the son is playing

So sed is a very common coordinating conjunction used to set one idea against another.

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

So:

• agricola can mean a farmer or the farmer
• filius can mean a son or the son
• horto can mean in a garden or in the garden

The context tells you which is best in translation.

That is why a Latin sentence can be shorter than its English translation.

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

So these could still make sense:

• In agris agricola multum laborat, sed in horto filius ludit.
• Agricola multum in agris laborat, sed filius in horto ludit.

However, word order is not random. It can change the emphasis or the style. The original sentence is straightforward and natural for a learner.

Ludit comes from ludere, which often means to play.

It can refer to:

• playing a game
• playing in a general sense
• sometimes acting playfully or amusing oneself

In a simple beginner sentence like this, plays is the natural translation. The contrast is probably:

• the farmer is doing serious work
• the son is playing in the garden

Here are the nouns and their declensions:

• agricola — first declension
• ager (seen here as agris) — second declension, but an important irregular-type noun because its stem changes slightly: ager, agri
• filius — second declension
• hortus (seen here as horto) — second declension

So this sentence gives you a mixture of:

• a first-declension masculine noun (agricola)
• several second-declension nouns

Yes. It has two main clauses joined by sed:

1. Agricola in agris multum laborat
2. sed filius in horto ludit

Each clause has:

• a subject
• a place phrase
• a verb

That makes the sentence easy to analyze and a good example of basic Latin sentence structure.