Serva cauta retro stat, ne mulus calcitret.

Here it is a noun: serva = female slave or maidservant.

A beginner might hesitate because serva can also be the singular imperative of servō (save! / preserve!). But in this sentence it is clearly a noun, because:

• it matches cauta
• cauta is a feminine nominative singular adjective
• together serva cauta naturally goes as the cautious slave

So the sentence begins with the subject.

Because it agrees with serva.

In Latin, adjectives must agree with the nouns they describe in:

• gender
• number
• case

So:

• serva = feminine, singular, nominative
• cauta = feminine, singular, nominative

That is why you get serva cauta, not serva cautus.

Most simply, it means the cautious slave.

The adjective cauta describes serva. Latin adjectives can often sound either:

• attributive: the cautious slave
• or slightly predicative/descriptive: the slave, cautious, ...

In a basic reading, though, you should just take serva cauta as a noun phrase: the cautious slave.

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

So:

• serva can mean a female slave or the female slave
• mulus can mean a mule or the mule

You decide from context which English article makes best sense.

Retro is an adverb.

It modifies stat and means something like:

• back
• backward
• to the rear
• at a distance behind

So retro stat means stands back.

Because retro is an adverb, it does not agree with any noun. It just modifies the verb.

Because Latin word order is flexible.

English relies heavily on word order to show who is doing what. Latin relies much more on endings, so the author has more freedom in arranging the words.

In this sentence:

• serva is still the subject because of its form and role
• stat is still the main verb
• retro naturally sits next to stat, because it modifies it

So Serva cauta retro stat is perfectly normal Latin. A different word order could also be possible, but this one is clear and natural.

Because ne and non do different jobs.

• non simply negates a statement: not
• ne often introduces a clause meaning so that ... not or lest

Here ne mulus calcitret means:

• so that the mule may not kick
• or more naturally in English, lest the mule kick

So this is not just ordinary negation; it is a clause of prevention or negative purpose.

Because after ne in this kind of clause, Latin normally uses the subjunctive.

calcitret is:

• present subjunctive
• third person singular
• from calcitrō = kick

The subjunctive is used because the kicking is not presented as a plain fact. It is something:

• possible
• intended to be avoided
• viewed as a potential result

So ne mulus calcitret means lest the mule kick / so that the mule does not kick.

Not really; it is best understood as a negative purpose or prevention clause.

A true fear clause usually follows a verb such as:

• timeō = I fear
• vereor = I fear
• metuō = I am afraid

But here the main verb is stat (stands). The idea is that the slave stands back in order to avoid being kicked.

So grammatically, this is better taken as:

• negative purpose
• or a clause of precaution/prevention

Even though English lest can sound like fear, the Latin structure here is not primarily a fear clause.

Because mulus is the subject of calcitret.

The sentence has two clauses:

1. Serva cauta retro stat
2. ne mulus calcitret

In the second clause, the mule is the one doing the kicking, so mulus must be nominative.

A useful way to see it is:

• serva ... stat = the slave stands
• mulus calcitret = the mule may kick

Each clause has its own subject and verb.

Stat is:

• third person singular
• present indicative active
• from stō = stand

So it means he/she/it stands or is standing.

Since the subject is serva, here it means she stands.

Latin does not always need to state the object if it is obvious or unimportant.

Here the point is simply that the mule might kick. The sentence does not need to spell out the victim. The danger is clear from context.

So ne mulus calcitret works well as lest the mule kick, with the object left understood.