Η αργοπορία του συνεργάτη μας άλλαξε όλο το πρόγραμμα της συνάντησης.

Because Greek often uses the definite article where English might not.

Η αργοπορία means the lateness or the delay in a specific situation. Here, it refers to a particular instance: our colleague/partner was late, and that specific lateness changed the meeting schedule.

Without the article, αργοπορία would sound more general or dictionary-like, like lateness as a concept.

Αργοπορία means lateness, being late, or sometimes delay caused by someone being late.

In this sentence, it refers to the fact that the colleague/partner arrived late.

A useful nuance:

• αργοπορία often focuses on a person being late
• καθυστέρηση is a broader word for delay in general

So here αργοπορία is very natural because the problem was someone's lateness.

This is the genitive phrase meaning of our colleague/partner.

Breakdown:

• του = of the (masculine/neuter singular genitive article)
• συνεργάτη = genitive singular of συνεργάτης
• μας = our

So:

• ο συνεργάτης μας = our colleague/partner
• η αργοπορία του συνεργάτη μας = our colleague's lateness

Greek often uses the genitive where English uses 's or of.

In Greek, possessive words like μου, σου, του, της, μας, σας, τους usually come after the noun.

So:

• ο συνεργάτης μας = our colleague
• literally: the colleague our

This is normal Greek word order.

You could think of μας here as a little possessive clitic attached to the noun phrase, not as a separate full adjective like English our.

Συνεργάτης can mean several related things depending on context:

• colleague
• coworker
• associate
• collaborator
• sometimes partner

In this sentence, colleague or associate is probably the safest translation unless the wider context makes partner clearer.

Άλλαξε is the aorist (simple past), 3rd person singular, of αλλάζω = to change.

So:

• αλλάζω = I change / I am changing
• άλλαξε = it changed

Here it means that the lateness caused a completed change in the schedule.

Because the subject is singular:

• Η αργοπορία = the lateness

That is one singular noun, so the verb must also be singular:

• Η αργοπορία ... άλλαξε ...
• The lateness ... changed ...

Even though the phrase του συνεργάτη μας is added, the true subject is still just η αργοπορία.

Όλο το πρόγραμμα means the whole schedule or the entire schedule.

Breakdown:

• όλο = whole / entire
• το πρόγραμμα = the schedule/program

So the sentence does not just say that the lateness changed the schedule; it says it changed the whole schedule.

Also notice agreement:

• πρόγραμμα is neuter singular
• so όλο is also neuter singular

This is a very common Greek pattern:

• όλος ο / όλη η / όλο το
  • noun

So:

• όλος ο κόσμος = the whole world / everybody
• όλη η μέρα = the whole day
• όλο το πρόγραμμα = the whole schedule

The article is normally kept with the noun even when όλος is used.

This is another genitive phrase.

• η συνάντηση = the meeting
• της συνάντησης = of the meeting

So:

• το πρόγραμμα της συνάντησης = the schedule of the meeting
• more naturally in English: the meeting schedule

Greek very often uses the genitive to connect two nouns like this.

Yes, literally it is program/schedule of the meeting.

But in English, the most natural translation is often:

• the meeting schedule
• the schedule for the meeting

Greek uses πρόγραμμα in a broad way. Depending on context, it can mean:

• schedule
• program
• agenda
• plan

Here schedule is probably the best fit.

Yes. Greek word order is more flexible than English word order.

The neutral order here is:

• Η αργοπορία του συνεργάτη μας άλλαξε όλο το πρόγραμμα της συνάντησης.

But you could also say:

• Άλλαξε όλο το πρόγραμμα της συνάντησης η αργοπορία του συνεργάτη μας.

That would still mean the same thing, but the emphasis would be different. Greek often moves words around for focus, emphasis, or style.

No, not in this form.

The grammatical subject is clearly:

• Η αργοπορία = the lateness

So the sentence means:

• The lateness of our colleague changed the whole meeting schedule.

If you wanted to say that the colleague himself changed the schedule, you would need a different sentence, such as:

• Ο συνεργάτης μας άλλαξε όλο το πρόγραμμα της συνάντησης.
• Our colleague changed the whole meeting schedule.

Because Greek uses the genitive very naturally to show relationships between nouns.

Here there are two:

1. του συνεργάτη μας = of our colleague
2. της συνάντησης = of the meeting

So the structure is basically:

• the lateness of our colleague
• changed the whole schedule of the meeting

This is extremely normal in Greek, even if English often prefers other structures like:

• our colleague's lateness
• the meeting schedule

Yes, it sounds natural and standard.

It is a clear, well-formed sentence that a native speaker could easily say or write. Depending on context, someone might choose slightly different words, but the grammar and phrasing are fully natural.

For example, a speaker might also say:

• Η καθυστέρηση του συνεργάτη μας άλλαξε όλο το πρόγραμμα της συνάντησης.

That version uses καθυστέρηση instead of αργοπορία, but your original sentence is perfectly good Greek.