ibeon silpae ttaemune neomu geokjeonghaji malgo dasi yeonseuphae.

이번 means this time or the current one. It is short for the idea of this occurrence / this instance.

In 이번 실패, it modifies 실패 (failure), so it means:

• this failure
• this time’s failure
• the failure this time

It is very common to use 이번 + noun:

• 이번 시험 = this exam
• 이번 주 = this week
• 이번 기회 = this opportunity

So 이번 실패 때문에 means because of this failure.

Because 때문에 directly attaches to a noun phrase, and you do not use 를/을 before it.

So this is correct:

• 이번 실패 때문에 = because of this failure

Not:

• 이번 실패를 때문에 ✗

You can think of 때문에 as behaving a bit like because of in English. It attaches to the noun phrase itself.

Examples:

• 비 때문에 = because of the rain
• 일 때문에 = because of work
• 실수 때문에 = because of a mistake

때문에 means because of and usually points to a cause or reason, often with a slightly more explicit or sometimes heavier feeling.

So:

• 이번 실패 때문에 너무 걱정하지 말고... = Because of this failure, don’t worry too much...

A similar sentence with -아서/-어서 could be:

• 이번에 실패해서 너무 걱정하지 말고...

That also means something like Since you failed this time, don’t worry too much...

The difference is mostly nuance:

• Noun + 때문에: focuses on a thing as the cause
  
  • 실패 때문에 = because of the failure
• Verb stem + 아서/어서: focuses on an action/event as the cause
  
  • 실패해서 = because you failed

Both are natural, but 실패 때문에 feels very straightforward and noun-based.

Yes, 너무 often means too much / excessively, and in this sentence that is exactly the idea.

• 너무 걱정하지 말고 = don’t worry too much

Here it softens the message a little. The speaker is not saying:

• Don’t worry at all

but rather:

• Don’t worry excessively
• Don’t overthink it
• Don’t be too worried

In modern Korean, 너무 can also sometimes mean very/really in casual speech:

• 너무 예뻐 = so pretty / really pretty

But in this sentence, it clearly has the original too much meaning.

This part has two pieces:

1. 걱정하지 말다
   = to not worry / don’t worry

2. -고
   = and, and then, or instead of that, do this next

So:

• 걱정하지 말고 다시 연습해 literally means something like
  Don’t worry, and practice again

More naturally:

• Don’t worry too much and practice again
• Instead of worrying too much, practice again

The pattern -지 말고 is very common for saying:

• don’t do X, do Y instead

Examples:

• 울지 말고 말해 봐. = Don’t cry; try talking instead.
• 늦지 말고 일찍 와. = Don’t be late; come early.

걱정 is a noun meaning worry, but 걱정하다 is the common verb meaning to worry.

So:

• 걱정 = worry (noun)
• 걱정하다 = to worry (verb)

Then to make it negative command form:

• 걱정하지 마 = don’t worry
• 걱정하지 말고 = don’t worry, and...

This noun + 하다 pattern is extremely common in Korean:

• 연습하다 = to practice
• 공부하다 = to study
• 실수하다 = to make a mistake
• 준비하다 = to prepare

연습해 is the informal/casual style. It is used when speaking to:

• a close friend
• someone younger
• a child
• someone you are comfortable with

The same sentence in other styles could be:

• 이번 실패 때문에 너무 걱정하지 말고 다시 연습해.
  casual / intimate

• 이번 실패 때문에 너무 걱정하지 말고 다시 연습해요.
  polite, conversational

• 이번 실패 때문에 너무 걱정하지 말고 다시 연습하세요.
  more formally polite / giving advice respectfully

So the sentence sounds like encouragement from someone speaking casually.

Grammatically, yes, it is an imperative-like form, but in Korean this form is often used for advice, encouragement, or suggestion-like direction, not only harsh commands.

In this sentence, it sounds encouraging:

• Don’t worry too much about this failure; practice again.

Because the first half is comforting and the second half is constructive, the overall tone is supportive rather than bossy.

Tone depends a lot on context and relationship. With a gentle voice, this sounds warm and motivating.

다시 means again.

Here it modifies 연습해:

• 다시 연습해 = practice again

Its placement before the verb is very natural. Korean adverbs like 다시 often come right before the verb they modify.

Common placements:

• 다시 연습해. = Practice again.
• 다시 한번 연습해. = Practice once again.
• 연습 다시 해. = possible in speech for emphasis, but less neutral

The standard, natural order is:

• 다시 연습해

Yes. Korean often omits the subject when it is obvious from context.

This sentence does not explicitly say you, but that is understood:

• (너는) 이번 실패 때문에 너무 걱정하지 말고 다시 연습해.

In English, you usually need the subject:

• Don’t worry too much about this failure and practice again.

In Korean, leaving it out sounds natural.

Yes, you could say:

• 이번에 실패했기 때문에 너무 걱정하지 말고 다시 연습해.

That means roughly:

• Because you failed this time, don’t worry too much and practice again.

Compared with the original:

• 이번 실패 때문에... = because of this failure
• 이번에 실패했기 때문에... = because you failed this time

The original focuses on the failure itself as a noun. The alternate version focuses on the action/event of failing.

The original is shorter and very natural in encouragement.

Korean often puts the reason, time, or topic near the beginning of the sentence.

So the structure is:

• 이번 실패 때문에 = because of this failure
• 너무 걱정하지 말고 = don’t worry too much
• 다시 연습해 = practice again

This is a very normal Korean flow:

reason/context → main advice/action

English can do something similar:

• Because of this failure, don’t worry too much and practice again.

But English often prefers:

• Don’t worry too much about this failure; just practice again.

Korean is comfortable front-loading the context.

Yes, that is a very good way to understand it.

While -고 literally means and, in patterns like -지 말고, it often carries the sense of:

• don’t do X; do Y instead
• rather than doing X, do Y

So:

• 너무 걱정하지 말고 다시 연습해 can be understood as:
• Instead of worrying too much, practice again

That captures the natural meaning very well.

The sentence sounds comforting, encouraging, and practical.

It does three things:

1. acknowledges a negative event

   • 이번 실패 때문에 = because of this failure

2. tells the listener not to dwell on it emotionally

   • 너무 걱정하지 말고 = don’t worry too much

3. redirects them toward action

   • 다시 연습해 = practice again

So the overall feeling is something like:

• Don’t be discouraged by this failure. Just keep practicing.

It is not cold or dismissive; it is meant to motivate the listener to move forward.