Μην έχεις έννοια, θα σε πάρω εγώ όταν φτάσω.

Yes, it is a very common idiomatic expression.

Literally, έννοια is related to thought, concern, worry, so Μην έχεις έννοια is something like don’t have concern.

In natural English, it usually means:

• Don’t worry
• No worries
• Leave it to me
• Don’t concern yourself

So even if you already know the overall meaning of the sentence, it helps to know that this first part is a set phrase Greeks use very naturally in everyday speech.

Because μην is used for:

• negative commands
• negative requests
• negative subjunctive structures

while δεν is used for simple statements of fact.

So:

• Δεν έχεις έννοια = You don’t have any worry / You aren’t worried
• Μην έχεις έννοια = Don’t worry

In this sentence, the speaker is telling someone not to worry, so μην is the correct choice.

In Modern Greek, negative imperatives are normally formed with:

• μη(ν)
  • subjunctive form

Greek does not use a separate negative imperative equivalent to English don’t + verb.

So:

• positive command: Έχε έννοια would sound odd here and is not how this expression is normally used
• negative command: Μην έχεις έννοια

Also, έχεις here looks identical to the present indicative you have, but after μην it functions as a subjunctive/command-like form.

This is very common in Greek:

• Μην πας = Don’t go
• Μην το κάνεις = Don’t do it
• Μην ανησυχείς = Don’t worry

Because έχω έννοια / μην έχεις έννοια works as a fixed expression.

Greek often leaves out the article in idiomatic expressions, especially when the noun is being used in a general or abstract way. Here έννοια does not mean the concern in a specific countable sense. It is more like worry/concern as an abstract idea.

So Μην έχεις την έννοια would not sound natural here.

Yes. Παίρνω literally means take, but in everyday Greek it is also very commonly used to mean:

• call someone
• phone someone

So:

• Θα σε πάρω = I’ll call you

This is one of those very useful everyday meanings you simply have to learn.

Examples:

• Θα σε πάρω αργότερα. = I’ll call you later.
• Με πήρε χθες. = He/She called me yesterday.

Depending on context, παίρνω κάποιον can also mean other things, but with a phone-related meaning it very often means call.

σε is the weak object pronoun meaning you.

So:

• σε = you
• πάρω = I take / I call
• θα σε πάρω = I will call you

Greek object pronouns usually come before the verb:

• σε βλέπω = I see you
• σε ξέρω = I know you
• θα σε πάρω = I’ll call you

For English speakers, this word order can take some getting used to, because English puts the object after the verb.

Yes, πάρω already shows that the subject is I, so εγώ is not grammatically necessary.

It is added for emphasis.

So:

• θα σε πάρω όταν φτάσω = neutral I’ll call you when I arrive
• θα σε πάρω εγώ όταν φτάσω = I’ll call you myself when I arrive or I’ll be the one to call you when I arrive

This can suggest things like:

• don’t call me, I’ll call you
• leave it to me
• I personally will handle it

Greek often uses explicit subject pronouns for emphasis, contrast, or clarification.

In standard Modern Greek, after όταν referring to the future, you normally do not use θα.

Instead, Greek uses:

• όταν
  • subjunctive-type form

So:

• όταν φτάσω = when I arrive
• not normally όταν θα φτάσω

This is one of the most important differences from English. English says when I arrive, not when I will arrive, and Greek works similarly here.

More examples:

• Θα σου πω όταν μάθω. = I’ll tell you when I find out.
• Θα φύγουμε όταν τελειώσει. = We’ll leave when it finishes.

φτάσω is the aorist subjunctive form of φτάνω.

After όταν for a future event, Greek often uses the aorist subjunctive when the action is viewed as a single completed event:

• όταν φτάσω = when I arrive

This is more natural than όταν φτάνω in this sentence.

Very roughly:

• φτάνω = present/imperfective, focusing on the process or repeated action
• φτάσω = aorist/perfective, focusing on the event as a whole

Since arriving is a single event here, φτάσω is the expected form.

It is natural everyday spoken Greek and feels fairly informal to neutral.

It is something you might say to:

• a friend
• a family member
• a colleague in a relaxed setting

It is reassuring and conversational.

In a more formal situation, someone might choose something less idiomatic, but this phrase is very common and widely understood.

Yes, Greek word order is flexible, though not completely free.

The sentence:

• Μην έχεις έννοια, θα σε πάρω εγώ όταν φτάσω.

is very natural.

But small shifts can change emphasis:

• Θα σε πάρω όταν φτάσω. = neutral
• Θα σε πάρω εγώ όταν φτάσω. = emphasis on I
• Όταν φτάσω, θα σε πάρω. = emphasis on the time sequence

So the original version sounds like a reassuring promise, with extra emphasis on I’ll be the one to call.

A helpful chunk-by-chunk reading is:

• Μην έχεις έννοια = Don’t worry
• θα σε πάρω εγώ = I’ll call you myself / I’ll call you
• όταν φτάσω = when I arrive

So the flow is:

Don’t worry, I’ll call you when I arrive.

The εγώ adds a little extra sense of I’ll take care of it.

They are close, but not identical in tone.

• Μην ανησυχείς = Don’t worry / Don’t be anxious
• Μην έχεις έννοια = Don’t worry / Leave it to me / No need to concern yourself

Μην έχεις έννοια often sounds a bit more reassuring and personal, especially when followed by a promise like θα σε πάρω εγώ.

So in this sentence, it fits very well because the speaker is not only calming the listener but also saying what they will do.