Si axis currus fractus erit, vehiculum per viam procedere non poterit.

Here axis means axle, the rod on which the wheels turn.

It is related to the English word axis, but in this sentence the meaning is the concrete mechanical one, not an abstract line or central axis. In Latin, axis can refer to an axle, and that is the sense that fits currus and vehiculum.

Because currus here is in the genitive singular, showing possession: the axle of the cart.

A very common beginner difficulty is that currus is a 4th-declension noun, and its nominative singular and genitive singular are both spelled currus without macrons. With macrons, you could distinguish them more clearly:

• nominative singular: currus
• genitive singular: currūs

So in this sentence, context tells you that currus means of the cart/chariot.

Axis is nominative singular.

It is the subject of fractus erit, so it is the thing that will have been broken. In other words, the axle is the grammatical subject of the if clause.

Fractus is a perfect passive participle. Latin combines it with a form of sum to make a passive tense.

So:

• fractus est = has been broken / is broken
• fractus erit = will have been broken

Here fractus agrees with axis, and erit supplies the tense.

Fractus erit is the future perfect passive: will have been broken.

Latin often uses this tense in a future condition with si when the action in the if clause must happen before the action in the main clause. The sequence is:

1. the axle will have been broken
2. then the vehicle will not be able to proceed

So this is a very normal Latin pattern:

• si
  • future perfect
• main clause in the future

English usually sounds more natural with a present tense in the if clause, such as If the axle is broken, the vehicle will not be able to proceed, even though the Latin is literally more like If the axle will have been broken...

Fractus is masculine nominative singular, agreeing with axis.

That agreement tells you three things:

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

This is one reason you can identify axis as the subject of the clause.

Because vehiculum is the subject of the second clause: the vehicle will not be able to proceed.

Latin does not have to repeat the exact same noun. The sentence shifts from talking about a specific part, the axle of the cart, to the whole thing, the vehicle. That is perfectly natural.

Also, vehiculum is nominative singular neuter, matching its role as the subject of poterit.

Procedere is a present active infinitive, and it depends on poterit.

After verbs meaning can, am able, will be able, Latin commonly uses an infinitive:

• poterit procedere = will be able to proceed

This is called a complementary infinitive. It completes the meaning of poterit.

Here non negates poterit: will not be able.

So the sense is inability:

• non poterit procedere = it will not be able to proceed

This is different from something like:

• poterit non procedere = it will be able not to proceed

That second version would suggest choice or possibility of not proceeding, not inability. So non poterit is exactly right for cannot / will not be able to.

Because per takes the accusative case.

So:

• via = nominative singular
• viam = accusative singular

Per viam means through the road, along the road, or more idiomatically in English, along the सड़क/road depending on context. In this sentence, it expresses movement along the route.

Classical Latin normally has no articles.

That means Latin often leaves it to context to show whether something is:

• a vehicle
• the vehicle
• sometimes even vehicle in a more general sense

English must usually choose an article, but Latin does not need one. So axis currus can mean the axle of the cart or an axle of a cart, depending on context. In most real translations, context makes the the most natural choice.

Latin word order is much freer than English word order, because the endings show the grammatical relationships.

This sentence’s order is natural and clear:

• Si axis currus fractus erit = the condition first
• vehiculum per viam procedere non poterit = the result after that

But Latin could rearrange many of these words without changing the basic meaning, as long as the forms stayed the same. Word order in Latin often affects emphasis more than basic grammar.