Τι εννοείς όταν λες ότι το πρόγραμμα είναι δύσκολο;

Τι means what. It introduces a direct question, just like what in English.

So Τι εννοείς...; means What do you mean... ?

In Greek, τι is very commonly used to ask for clarification:

• Τι λες; = What are you saying?
• Τι θέλεις; = What do you want?

Εννοείς comes from the verb εννοώ, which means to mean or to have in mind.

Here, εννοείς is:

• 2nd person singular
• present tense
• so it means you mean

So:

• Τι εννοείς; = What do you mean?

It can also have the sense of what exactly are you trying to say?

Because the sentence is addressing you.

The verb changes depending on the subject:

• εννοώ = I mean
• εννοείς = you mean
• εννοεί = he/she/it means

Since the sentence is asking you what you mean, Greek uses εννοείς.

Όταν means when.

In this sentence, it introduces a time-related subordinate clause:

• όταν λες ότι... = when you say that...

So the structure is:

• Τι εννοείς = What do you mean
• όταν λες ότι... = when you say that...

It is a very common word for connecting clauses.

Λες comes from λέω, meaning to say.

It is:

• 2nd person singular
• present tense
• meaning you say

So όταν λες ότι... literally means when you say that...

The whole sentence is asking for clarification about something the other person said:

• What do you mean when you say that the program is difficult?

Ότι means that and introduces a content clause.

So:

• λες ότι το πρόγραμμα είναι δύσκολο = you say that the program is difficult

In English, that is sometimes optional:

• You say that the program is difficult
• You say the program is difficult

In Greek, ότι is very commonly used in this kind of sentence.

Το πρόγραμμα means the program.

πρόγραμμα is a neuter noun in Greek, so it takes the neuter singular article το.

Greek articles change according to gender, number, and case. Here:

• το = neuter singular nominative/accusative
• πρόγραμμα = neuter singular

So:

• το πρόγραμμα = the program

Depending on context, πρόγραμμα could mean:

• a computer program
• a schedule
• a plan
• a program of study

Because δύσκολο agrees with πρόγραμμα, which is neuter singular.

Greek adjectives must agree with the noun they describe in:

• gender
• number
• case

Forms of δύσκολος:

• δύσκολος = masculine
• δύσκολη = feminine
• δύσκολο = neuter

Since πρόγραμμα is neuter:

• το πρόγραμμα είναι δύσκολο = the program is difficult

Είναι can be used for both he/she/it is and they are in Modern Greek, depending on context.

Here it is singular because the subject is το πρόγραμμα:

• το πρόγραμμα είναι δύσκολο = the program is difficult

Even though the form είναι looks the same for singular and plural, the subject tells you which meaning is intended.

It is in the nominative case, because it is the subject of είναι.

In the clause:

• το πρόγραμμα είναι δύσκολο

το πρόγραμμα is the thing being described, so it is the grammatical subject.

The adjective δύσκολο matches it in form.

In Greek, the question mark is written as a semicolon: ;

So:

• ; in Greek = ? in English

That means:

• Τι εννοείς όταν λες ότι το πρόγραμμα είναι δύσκολο; is a question.

This is one of the punctuation marks that often surprises English speakers.

Yes, sometimes, but this full version is natural and clear.

For example, Greek often drops subject pronouns because the verb ending already shows the person:

• Τι εννοείς; already means What do you mean? There is no need to add εσύ unless you want emphasis.

Also, in some contexts, ότι might be omitted in informal speech, but keeping it makes the structure clear and standard:

• λες ότι το πρόγραμμα είναι δύσκολο

So this sentence is a very normal, complete way to say it.

Not completely. Greek word order is more flexible than English, but this version is the most straightforward and natural.

Standard order here is:

• Τι εννοείς όταν λες ότι το πρόγραμμα είναι δύσκολο;

A speaker could change word order for emphasis, but learners should treat this sentence as the normal pattern.

For example, the important structure is:

• Τι εννοείς = main question
• όταν λες ότι... = clause explaining what is being asked about

So even if Greek allows flexibility, this sentence is already in a very useful default order.