Mi atendas vin ĉe la haltejo.

Because vin is the direct object of atendas.

In Esperanto, the ending -n marks the accusative, which usually shows the thing or person directly affected by the verb.

• mi = I
• vin = you, as the direct object

So:

• Mi atendas vin = I am waiting for you

This is different from English, where we say wait for you with a preposition.

Because the Esperanto verb atendi works differently from English wait.

In Esperanto, atendi is normally a transitive verb, so it takes a direct object:

• Mi atendas vin = I am waiting for you
• Ŝi atendas la buson = She is waiting for the bus

So English wait for someone/something usually becomes simply atendi iun/ion in Esperanto.

It can mean either one.

The Esperanto present tense ending -as covers both:

• a general present: I wait
• an ongoing present: I am waiting

So Mi atendas vin can mean:

• I wait for you
• I am waiting for you

Usually context tells you which is meant. In most everyday situations, English I am waiting for you is just translated with the simple Esperanto present.

Here, ĉe means something like at or by.

So:

• ĉe la haltejo = at the stop / by the stop

It shows location near or at a place, not movement toward it.

Compare:

• ĉe la haltejo = at the stop
• al la haltejo = to the stop
• en la haltejo = in the stop / inside the stop

In this sentence, ĉe is the natural choice because the idea is being at that location.

Because en means in or inside, while ĉe means at.

A stop is usually treated as a point or location, so Esperanto commonly uses ĉe:

• Mi atendas vin ĉe la haltejo = I’m waiting for you at the stop

If you said en la haltejo, that would suggest being physically inside some enclosed structure, such as a shelter or station building. That can be possible in some contexts, but it is not the neutral, usual wording here.

Haltejo is built from parts:

• halt- = stop
• -ej- = place for
• -o = noun ending

So haltejo literally means a place for stopping.

In normal English, that would be something like:

• stop
• bus stop
• tram stop
• stopping place

The exact kind of stop depends on context.

Not necessarily.

Haltejo is a general word for a stopping place, especially for transport. Depending on context, it may be understood as a bus stop, tram stop, or similar place.

If you want to be more specific, Esperanto can make compounds such as:

• bushaltejo = bus stop
• tramhaltejo = tram stop

So la haltejo by itself is often enough when the situation is clear.

La is the definite article, meaning the.

So la haltejo means the stop, not just any stop.

It suggests that the speaker and listener can identify which stop is meant, for example:

• the usual stop
• the stop already mentioned
• the obvious stop in the situation

Without la, the phrase would be less specific. Esperanto often allows a bare noun, but if you mean one particular known stop, la haltejo is the natural choice.

Yes. Esperanto word order is fairly flexible.

The neutral order here is:

• Mi atendas vin ĉe la haltejo.

But you could also say:

• Ĉe la haltejo mi atendas vin.
• Vin mi atendas ĉe la haltejo.

Because vin has the accusative ending -n, its role is clear even if the order changes.

Still, the original order is the most straightforward and natural in ordinary conversation.

Because Esperanto verbs show tense, but not person.

The ending -as only tells you that the verb is present tense. It does not tell you whether the subject is I, you, he, she, we, or they.

So atendas by itself could mean:

• wait
• am waiting
• is waiting
• are waiting

Therefore, Esperanto normally keeps the subject pronoun:

• Mi atendas = I am waiting
• Vi atendas = You are waiting
• Ili atendas = They are waiting

A rough guide:

• ĉ sounds like ch in church
• j sounds like y in yes
• stress in Esperanto normally falls on the second-to-last syllable

So:

• ĉe sounds roughly like cheh
• haltejo sounds roughly like hal-TEH-yo

The full phrase is approximately:

• cheh la hal-TEH-yo

And the whole sentence is roughly:

• mee ah-TEN-dahs veen cheh la hal-TEH-yo