geugeon ajik bimirinikka samchonhantedo malhaji ma.

그건 is a contracted form of 그것은 (or very commonly 그거는 in speech).

• 그것 / 그거 = that / that thing
• -은 / -는 = topic marker

So 그건 means something like as for that or that thing is...

In everyday Korean, contractions like this are very common:

• 그것은 → 그건
• 이것은 → 이건
• 저것은 → 저건

So this is just a natural, shortened spoken-style form.

In 그건, the 건 comes from 것은.

So:

• 그 = that
• 것 = thing
• 은 = topic particle

Together:

• 그것은 → 그건

This kind of contraction happens a lot in Korean, especially in casual or conversational language.

아직 means still or yet, depending on the sentence.

In this sentence, because it is used with a positive statement (비밀이야 / 비밀이다), it means still:

• 아직 비밀이야 = It’s still a secret

Compare:

• 아직 비밀이야 = It’s still a secret.
• 아직 안 했어 = I haven’t done it yet.

So 아직 can mean:

• still with a positive statement
• yet with a negative statement

비밀이니까 comes from:

• 비밀 = secret
• 이다 = to be
• -(으)니까 = because / since

So:

• 비밀이다 = to be a secret
• 비밀이니까 = because it’s a secret / since it’s a secret

More literally, the sentence is saying:

• Because that is still a secret, don’t tell your uncle either.

Great question. -(으)니까 often sounds very natural when giving a reason for a command, suggestion, or request.

So in this sentence:

• 그건 아직 비밀이니까 = since that’s still a secret
• 말하지 마 = don’t tell

This combination is very common:

• reason + -(으)니까 + command/request

For example:

• 늦었으니까 빨리 가자. = It’s late, so let’s go quickly.
• 위험하니까 만지지 마. = It’s dangerous, so don’t touch it.

You can sometimes use -아서/어서 for reasons, but with commands and suggestions, -(으)니까 is often the more natural choice.

Let’s break it down:

• 삼촌 = uncle
• 한테 = to
• 도 = also / too / even

So 삼촌한테도 means:

• to uncle too
• or, in more natural English here, even to your uncle
• or to your uncle either, depending on context

Because the main verb is negative (말하지 마 = don’t tell), 도 often gives the sense of either or even.

So the whole idea is:

• Don’t tell your uncle either
• or Don’t even tell your uncle

The exact English wording depends on context.

Yes. 한테 and 에게 can both mean to someone.

• 한테 = very common in speech, conversational
• 에게 = a bit more neutral or formal
• 께 = honorific, used for someone deserving respect

So these are possible:

• 삼촌한테도 말하지 마 = casual, natural in conversation
• 삼촌에게도 말하지 마 = also correct, slightly less colloquial
• 삼촌께도 말씀드리지 마세요 = much more honorific and formal, with different verb choice too

In this sentence, 한테 matches the casual tone.

Here it is best understood as tell.

• 말하다 can mean to speak, to say, or to tell
• when you use a person marked with 한테 / 에게, it often has the sense of tell someone

So:

• 삼촌한테 말하다 = tell uncle

That’s why 말하지 마 here means don’t tell him, not just don’t speak in general.

말하지 마 is the casual negative imperative: don’t say / don’t tell.

It comes from:

• 말하다 = to say / to tell
• -지 마 = don’t do...

So:

• 말하다 → 말하지 마

Examples:

• 가지 마 = don’t go
• 먹지 마 = don’t eat
• 보지 마 = don’t look
• 말하지 마 = don’t say / don’t tell

This is a very common pattern in Korean.

No, it is casual/informal.

It would be natural when speaking to:

• a friend
• a younger person
• a child
• someone you are very close to

Polite versions would be:

• 말하지 마세요 = please don’t tell
• 말하지 마십시오 = please do not tell

So the original sentence has a casual tone.

Korean often omits things that are already understood from context.

Here, the topic 그건 already tells us what the speaker is talking about:

• that
• that matter
• that thing

So the sentence does not need to repeat it after 말하다.

A fuller version could be something like:

• 그건 아직 비밀이니까 삼촌한테도 그 얘기 말하지 마.
• 그건 아직 비밀이니까 삼촌한테도 그걸 말하지 마.

But Korean usually prefers omission when the meaning is clear.

The structure is:

• 그건 = as for that
• 아직 비밀이니까 = because it’s still a secret
• 삼촌한테도 = to uncle too / even to uncle
• 말하지 마 = don’t tell

So Korean puts the reason before the command:

• Because it’s still a secret, don’t tell your uncle either.

This is very typical Korean word order.

Not exactly. Korean family terms are often more specific than English ones.

삼촌 can mean uncle, but in real-life usage Korean kinship terms can be more precise depending on which side of the family and age relationships. Also, 삼촌 can sometimes be used more loosely for an adult man in certain contexts.

In this sentence, though, the important point for a learner is simply that 삼촌한테도 means to uncle too/even to uncle.

Because standard Korean spacing treats 마 here as a separate word in this negative-command pattern.

So the standard spelling is:

• 말하지 마
• 가지 마
• 먹지 마

Not:

• 말하지마
• 가지마
• 먹지마

You may sometimes see the no-space versions online or in casual texting, but the standard written form uses a space.

No, not really. 아직 here is modifying 비밀 in the idea it is still a secret, not directly modifying 말하다.

So the meaning is:

• That is still a secret, so don’t tell uncle either.

If you wanted don’t tell uncle yet, Korean would be expressed differently, such as:

• 아직 삼촌한테 말하지 마.

That places 아직 closer to the act of telling, so it means don’t tell uncle yet.