bueokeseo naemsaega naseo changmuneul yeoreoyo.

It breaks down like this:

• 부엌에서 = from/in the kitchen
• 냄새가 나서 = because a smell is coming out / because it smells
• 창문을 열어요 = (I) open the window

So the overall structure is:

[place/source] + [smell comes out] + [so/because] + [open the window]

A very natural English translation is:

Because there’s a smell coming from the kitchen, I open the window.

or

A smell is coming from the kitchen, so I open the window.

Here, 에서 marks the place something comes from or happens at.

In this sentence, the smell is understood as coming from the kitchen, so 부엌에서 means:

• in the kitchen
• or more naturally here, from the kitchen

With 나다 in expressions like 냄새가 나다, 소리가 나다, or 연기가 나다, 에서 often marks the source:

• 부엌에서 냄새가 나요 = A smell is coming from the kitchen
• 방에서 소리가 나요 = A sound is coming from the room

So 에서 is the natural choice because the kitchen is the source of the smell.

In Korean, 냄새가 나다 is the standard expression for a smell to come out, to smell, or for there to be a smell.

Literally:

• 냄새 = smell
• 나 다 = to come out / to occur

So 냄새가 나다 literally means something like:

A smell comes out or A smell occurs

This is just how Korean naturally expresses the idea. English often uses smell as a verb, but Korean commonly uses a noun + 나다 pattern.

Similar expressions:

• 소리가 나다 = a sound is heard / a sound comes out
• 연기가 나다 = smoke comes out
• 문제가 나다 is not natural in the same way, so this pattern works with certain nouns, not everything

Because 냄새 is the subject of 나다.

In 냄새가 나다, the smell is the thing that appears, comes out, or exists, so it takes the subject particle 가.

• 냄새가 나요 = A smell is coming out / There is a smell
• not 냄새를 나요

This is similar to how other intransitive-style expressions work in Korean:

• 소리가 나요 = A sound is coming out
• 열이 나요 = I have a fever / literally heat is coming out

So 가 is used because 냄새 is not a direct object here.

나서 is the -아서/-어서 connective form of 나다.

• dictionary form: 나다
• connective form: 나서

In this sentence, -서 shows a reason or cause:

• 냄새가 나서 = because there is a smell
• or so, since a smell is coming out

So the sentence means:

Because a smell is coming from the kitchen, I open the window.

This -아/어서 form often connects two actions or clauses when the first one explains the reason for the second.

Examples:

• 더워서 문을 열어요. = Because it’s hot, I open the door.
• 피곤해서 자요. = Because I’m tired, I sleep.

The subject is omitted because Korean often leaves it out when it is obvious from context.

So 창문을 열어요 literally just says:

open the window

But in natural context, it usually means:

• I open the window
• or we open the window
• or someone opens the window

In a normal standalone sentence like this, most learners should understand it as:

I open the window

Korean frequently drops subjects like 저는 or 제가 when they are not necessary.

A fuller version could be:

• 저는 부엌에서 냄새가 나서 창문을 열어요.

But that often sounds less natural unless you need contrast or emphasis.

Because 창문 is the direct object of 열어요.

• 창문 = window
• 을 = object particle
• 열어요 = open

So:

• 창문을 열어요 = open the window

This is a very standard object + verb pattern in Korean.

Compare:

• 문을 열어요 = open the door
• 책을 읽어요 = read a book
• 물을 마셔요 = drink water

Korean present tense can be broader than English present tense.

열어요 can mean different things depending on context:

• I open the window
• I’m opening the window
• I open the window when that happens
• sometimes even a near-future sense like I’ll open the window

In this sentence, the most natural interpretation is something like:

Because there’s a smell coming from the kitchen, I open the window.

or

Because there’s a smell coming from the kitchen, I’m opening the window.

If you wanted to make the past clear, you could say:

• 부엌에서 냄새가 나서 창문을 열었어요.
  = Because there was a smell coming from the kitchen, I opened the window.

Not always, but very often it suggests just a smell, and depending on context it can feel neutral or slightly negative.

In everyday use, 냄새가 나다 often implies that the smell is noticeable and sometimes unpleasant. That is why opening the window sounds natural here.

If you want to clearly describe a pleasant smell, Korean often uses more specific words such as:

• 향기 = fragrance
• 향이 나다 = a pleasant scent is coming out

Compare:

• 음식 냄새가 나요. = I smell food / There’s a smell of food.
• 꽃향기가 나요. = There’s a floral fragrance.

So in this sentence, many learners will naturally understand 냄새 as a smell that makes you want ventilation.

It is commonly pronounced close to 부어케서.

That is because 부엌 by itself is pronounced roughly like 부억, and when followed by a vowel-initial particle like 에서, the final consonant links into the next syllable.

So:

• 부엌 → roughly 부억
• 부엌에서 → roughly 부어케서

This is one of those words whose pronunciation is not obvious from spelling, so it is worth memorizing separately.

Yes, that is often a perfectly natural translation.

Even though the Korean literally looks more like a smell comes out, so..., in natural English you can say:

• It smells, so I open the window.
• There’s a smell, so I open the window.
• A smell is coming from the kitchen, so I open the window.

The best translation depends on what you want to emphasize:

• There’s a smell focuses on the existence of the smell
• A smell is coming from the kitchen focuses on the source
• It smells is natural English but less literal

So yes, it smells, so... is a good natural translation, especially if the meaning has already been made clear.