Uliponisindikiza hadi stesheni, nilijisikia salama.

It has several pieces:

• u- = you (singular subject)
• -li- = past tense
• -po- = when
• -ni- = me
• sindikiza = accompany, escort, see off

So uliponisindikiza means when you accompanied me or when you saw me off.

Because Swahili can build when into the verb itself.

Here, -po- is doing that job. So instead of using a separate word before the clause, Swahili often says:

• ulipo... = when you...
• nilipo... = when I...

That is why uliponisindikiza already includes the idea of when you accompanied me.

-ni- is the object marker for me.

So:

• ulisindikiza = you accompanied
• ulinisindikiza = you accompanied me
• uliponisindikiza = when you accompanied me

In Swahili, object pronouns often go inside the verb instead of being separate words.

It can mean all of those, depending on context.

Common senses are:

• accompany
• escort
• see someone off

In this sentence, because of hadi stesheni, it strongly suggests accompanying someone to the station or seeing them off to the station.

Hadi means up to, until, or as far as.

In this sentence it is being used for destination/limit:

• hadi stesheni = to the station / as far as the station

So it shows the endpoint of the accompanying.

Stesheni is a loanword from English station.

It is very common in everyday Swahili, especially in contexts like transport. Depending on context, it could mean a train station, bus station, or another kind of station.

You may also see more native Swahili words in some contexts, such as kituo, but stesheni is perfectly normal.

It breaks down like this:

• ni- = I
• -li- = past tense
• -ji- = self
• sikia = hear, feel

So nilijisikia literally has the idea of I felt myself, which is why it means I felt.

This is a very common Swahili way to express feelings or physical states.

-ji- is a reflexive marker, meaning something like oneself.

So:

• nilisikia = I heard
• nilijisikia = I felt / literally I heard myself

English uses feel here, but Swahili often uses this reflexive pattern with -jisikia to talk about how someone feels.

Salama means safe, secure, all right, or at peace, depending on context.

Here it means safe.

It does not change form here because it is being used as a state or condition after nilijisikia:

• nilijisikia salama = I felt safe

Many words like salama stay the same in this kind of structure.

Because Swahili usually puts the subject inside the verb.

For example:

• u- in uliponisindikiza already means you
• ni- in nilijisikia already means I

So separate subject pronouns are often unnecessary unless you want emphasis or contrast.

You would change the subject marker for you from singular to plural.

• Uliponisindikiza hadi stesheni, nilijisikia salama. = speaking to one person
• Mliponisindikiza hadi stesheni, nilijisikia salama. = speaking to more than one person

So u- becomes m- for you all.

Yes, but the meaning would change a little.

• ulinisindikiza hadi stesheni = you accompanied me to the station
• uliponisindikiza hadi stesheni = when you accompanied me to the station

So -po- is important because it connects that action to the second clause in a when... sense. Without -po-, you lose that specific time-linking meaning.