baesong gisaga agi oseul gyeongbisire matgyeossseupnida.

In Korean, many noun + noun combinations are written with a space when they refer to a person’s role or job.

• 배송 = delivery
• 기사 = driver / 기사, often used for someone who operates a vehicle professionally

So 배송 기사 means delivery driver or delivery person.

This is similar to combinations like:

• 택시 기사 = taxi driver
• 버스 기사 = bus driver

Both are possible in Korean, but they give slightly different nuance.

• 배송 기사가 simply marks the delivery driver as the subject of this action.
• 배송 기사는 would add more of a topic/contrast feeling, like as for the delivery driver...

In a straightforward sentence describing what happened, 가 is very natural.

So here, 배송 기사가 아기 옷을 경비실에 맡겼습니다 is just a neutral description: The delivery driver left the baby clothes at the security office.

Korean often puts two nouns together directly, where English might use baby clothes or the baby's clothes.

• 아기 옷 = baby clothes / clothes for a baby
• 아기의 옷 = the baby’s clothes

Both are grammatical, but 아기 옷 is more natural and common when describing the type of item rather than emphasizing ownership.

So in this sentence, 아기 옷 sounds like a normal package item description.

맡기다 means to leave something with someone, to entrust something, or to hand something over for safekeeping/handling.

In this sentence, it means the delivery driver did not keep the baby clothes and did not necessarily deliver them directly to the recipient. Instead, the driver left them with the security office.

Common uses of 맡기다 include:

• 가방을 친구에게 맡기다 = leave a bag with a friend
• 아이를 부모님께 맡기다 = leave a child with one’s parents
• 짐을 프런트에 맡기다 = leave luggage at the front desk

So here the sense is: The delivery driver left the baby clothes at/with the security office.

Here, 에 marks the place where something is left.

• 경비실 = security office / guard office / concierge/security desk area
• 경비실에 맡기다 = to leave something at the security office

With 맡기다, Korean often uses:

• 사람/기관 + 에게/한테/께 맡기다 when focusing on the person
• 장소 + 에 맡기다 when focusing on the place or office/desk

So 경비실에 맡겼습니다 is natural because the security office is treated as the place/institution where the item was left.

Yes. Those are possible and can add slight emphasis to the destination/location.

• 경비실에 맡겼습니다 = neutral
• 경비실에다 맡겼습니다 = slightly more emphasis on where it was left
• 경비실에다가 맡겼습니다 = even more conversational/emphatic

All are understandable, but the plain 에 version is the most neutral and common in textbook-style sentences.

을/를 marks the direct object of the verb.

Here:

• 아기 옷을 = the baby clothes
• this is the thing being left/entrusted

So the structure is:

• 배송 기사가 = subject
• 아기 옷을 = object
• 경비실에 = location/place where it was left
• 맡겼습니다 = left/entrusted

Good question. These can sound similar in English, but the nuance is different.

• 맡겼습니다 = left it with someone / entrusted it to a place or person
• 두었습니다 = placed it / left it there
• 놨습니다 = put it down / left it there

If a delivery driver leaves a package at a security office, 맡겼습니다 is especially natural because it implies the package was handed over to the office or staff for safekeeping.

If you say 경비실에 두었습니다, it can sound more like it was placed there, without emphasizing the idea of entrusting it to someone.

경비실 usually refers to the small office or room used by building security staff, especially in apartment complexes or office buildings.

Depending on context, it may be translated as:

• security office
• guard office
• security desk
• sometimes roughly concierge desk in certain buildings

In Korean daily life, deliveries are often left at the 경비실 if the recipient is not available.

Korean is basically an SOV language:

• Subject
• Object
• Verb

So the sentence order is:

• 배송 기사가 = subject
• 아기 옷을 = object
• 경비실에 = location
• 맡겼습니다 = verb

English would usually say: The delivery driver left the baby clothes at the security office.

Korean normally saves the main verb until the end.

It comes from the dictionary form 맡기다.

Step by step:

• dictionary form: 맡기다
• past stem: 맡겼-
• polite formal ending: -습니다

So:

• 맡겼습니다 = left / entrusted
• specifically, past tense + polite formal style

This style is very common in announcements, customer service, written notices, and polite speech.

Yes, it is polite and formal because of -습니다.

This style is often used by:

• delivery notifications
• customer service staff
• apartment office staff
• formal spoken updates
• polite written messages

For example, a delivery message might say that the package was left at the security office. In casual speech, someone might instead say:

• 배송 기사가 아기 옷을 경비실에 맡겼어요.

That is still polite, but less formal.

Yes. 기사 has several meanings depending on context, which can confuse learners.

Common meanings include:

• driver/operator in words like 택시 기사, 버스 기사, 배송 기사
• article/news story as in 신문 기사
• historically, knight, though that is much less common in daily conversation

In 배송 기사, it clearly means delivery driver/delivery worker.

Yes. Korean often omits information that is obvious from context.

For example, if everyone already knows what item is being discussed, people might say:

• 배송 기사가 경비실에 맡겼습니다.
  = The delivery driver left it at the security office.

Or if the subject is obvious:

• 아기 옷을 경비실에 맡겼습니다.
  = They/I/he/she left the baby clothes at the security office.

Korean often drops subjects and other elements when they are understood.

Not necessarily, but it strongly suggests the item was left in the care of the security office rather than simply dropped somewhere.

Because the verb is 맡기다, the nuance is:

• the item was entrusted
• it was left with the security office
• someone there is assumed to be responsible for it, or the office is treated as the receiving place

So it sounds more deliberate and secure than just putting it somewhere.