oneureun bunrisugeohaneun nariraseo byeongirang kaeneul ssiseoyo.

분리수거 literally means separating and collecting trash by type, especially recyclables. In everyday Korean, it usually refers to sorting recycling or putting out recyclables properly.

So in this sentence, it refers to recycling day, more specifically the day when you sort out and dispose of things like bottles and cans.

Here, 하는 is the noun-modifying form of 하다.

• 분리수거하다 = to do recycling sorting / to separate recyclables
• 분리수거하는 날 = the day when [someone] does recycling

This is a very common Korean pattern:

• 공부하는 시간 = the time when one studies
• 운동하는 날 = the day when one exercises
• 비 오는 날 = a day when it rains

So 분리수거하는 날 means recycling day literally as the day for doing recycling.

날 here means day, but not in exactly the same way as 하루 or 날짜.

• 날 = day, often used in expressions like a day when something happens
• 하루 = one whole day
• 날짜 = calendar date

So:

• 분리수거하는 날 = the day for recycling
• 쉬는 날 = a day off
• 생일날 = birthday day / on one’s birthday

In this sentence, 날 is the natural word because it means a particular kind of day.

-은 is the topic marker. It sets 오늘 (today) as the topic or frame for the sentence.

So 오늘은 has a nuance like:

• As for today...
• Today, ...
• On today’s schedule...

It can also give a slight contrast, such as implying that today is different from other days.

For example:

• 오늘은 바빠요. = As for today, I’m busy.
• 오늘은 분리수거하는 날이라서... = As for today, since it’s recycling day...

-이라서 / -라서 means because it is... or so..., and it connects a reason to the next clause.

Here:

• 날 = day
• 날이라서 = because it is a day / since it is a day

So:

• 분리수거하는 날이라서 = because it’s recycling day

The form is:

• noun + 이라서 after a consonant
• noun + 라서 after a vowel

Examples:

• 학생이라서 바빠요. = Because I’m a student, I’m busy.
• 휴일이라서 집에 있어요. = Because it’s a holiday, I’m at home.
• 의사라서 바빠요. = Because I’m a doctor, I’m busy.

Since 날 ends in a consonant, -이라서 is used.

이랑 means and in casual speech when connecting nouns.

So:

• 병이랑 캔 = bottles and cans

Then -을 marks the whole noun phrase as the object of 씻어요.

Korean often marks only the last noun in a list with the case particle:

• 병이랑 캔을 씻어요 = I wash bottles and cans

This is completely natural. You do not need to put -을 on both nouns.

Other possible connectors are:

• 병하고 캔을 = bottles and cans
• 병과 캔을 = bottles and cans (more formal/written)

Yes. 이랑 is a casual spoken way to say and between nouns.

Examples:

• 친구랑 영화 봐요. = I watch a movie with my friend.
• 빵이랑 우유 = bread and milk
• 병이랑 캔 = bottles and cans

It is very common in conversation. More formal alternatives are:

• 하고 = also common, slightly neutral
• 과/와 = more formal, often written

So 병이랑 캔을 씻어요 sounds natural and conversational.

Korean often does not mark plural when the meaning is clear from context.

So:

• 병 can mean bottle or bottles
• 캔 can mean can or cans

Because this sentence is about recycling, it is natural to understand them as bottles and cans in general.

Korean uses plural markers like -들 much less often than English. Adding -들 here would usually be unnecessary.

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

So 병이랑 캔을 씻어요 can mean:

• I wash the bottles and cans
• We wash the bottles and cans
• [Someone] washes the bottles and cans

In many everyday situations, the listener already knows who is being talked about, so Korean leaves the subject out.

This is one of the most common differences from English.

씻어요 comes from 씻다, which means to wash or to rinse.

In the context of recycling, it means washing/rinsing the bottles and cans before throwing them out. That is very natural Korean.

So:

• 병이랑 캔을 씻어요 = I wash/rinse the bottles and cans

This sounds more natural than translating too literally as something like clean the recyclables. Korean often uses 씻다 for containers that should be rinsed out.

씻어요 is the polite present form, but Korean present tense is broader than English present tense.

Depending on context, it can mean:

• I wash
• I’m washing
• I wash (as a habit)
• I’ll wash / I’m going to wash in a near-future sense

In this sentence, because it says today is recycling day, the most natural understanding is something like:

• I wash the bottles and cans
• I’m washing the bottles and cans
• I wash/rinse bottles and cans because it’s recycling day

The exact English tense depends on the situation, but the Korean form itself is completely normal.

Yes, 병 can also mean illness/disease in other words, but not here.

In this sentence:

• 병이랑 캔을 씻어요

because it is paired with 캔 (can) and the topic is recycling, 병 clearly means bottle.

So context makes the meaning unambiguous.