chigwa yeyak siganeul dasi hwaginhaesseoyo.

Here, 치과 most naturally means the dentist or the dental clinic/dentist’s office.

In Korean, 치과 can refer to:

• the field of dentistry
• a dental department
• a dentist’s office / dental clinic

In 치과 예약 시간, it means the appointment time for the dentist / at the dental clinic.

So the whole phrase is understood as the dentist appointment time or more naturally in English, the time of the dental appointment.

Because 치과 is modifying the noun phrase that follows it.

In Korean, nouns often combine directly like this:

• 치과 예약 = dental appointment / dentist appointment
• 예약 시간 = appointment time
• 치과 예약 시간 = dental appointment time

So 치과 is not acting as a separate subject or object here. It is just part of a longer noun phrase.

This is very common in Korean:

• 학교 숙제 = school homework
• 버스 시간 = bus time / bus schedule time
• 병원 예약 = hospital appointment

The -을 is the object marker.

The verb is 확인했어요 = checked/confirmed, and the thing being checked is 치과 예약 시간.

So:

• 치과 예약 시간 = the dentist appointment time
• 치과 예약 시간을 = the dentist appointment time + object marker

That means:

• I checked what?
• The dentist appointment time.

Because 시간 ends in a consonant, it takes -을 rather than -를.

Compare:

• 시간을 확인했어요 = checked the time
• 주소를 확인했어요 = checked the address

It is both.

Literally:

• 예약 = reservation / appointment / booking
• 시간 = time

Together, 예약 시간 means appointment time or reservation time.

In this sentence, 예약 시간 is treated as a single unit of meaning: the time of the appointment.

So 치과 예약 시간 is best understood as one noun phrase:

• the time of the dentist appointment

다시 means again.

So 다시 확인했어요 means:

• checked again
• confirmed again
• rechecked

It shows that the speaker had already checked it before, and then checked it one more time.

Examples:

• 다시 말해 주세요. = Please say it again.
• 다시 전화할게요. = I’ll call again.
• 다시 확인했어요. = I checked again.

Because 다시 is an adverb, and in Korean adverbs usually come before the verb they modify.

Here:

• 다시 = again
• 확인했어요 = checked/confirmed

So:

• 다시 확인했어요 = checked again

This is the normal Korean pattern.

You will often see:

• 천천히 말해 주세요. = Please speak slowly.
• 빨리 갔어요. = went quickly
• 다시 봤어요. = saw it again

확인했어요 comes from the verb 확인하다, which means:

• to check
• to confirm
• to verify

So depending on context, 확인했어요 can mean:

• checked
• confirmed
• verified

In this sentence, checked again or confirmed again are both natural.

Breakdown:

• 확인하다 = to check/confirm
• 확인했어요 = checked/confirmed

It is the past tense polite form.

It comes from:

• 확인하다 = to check
• 확인하-
  • past marker -았/었-
    • polite ending -어요

Because 하다 verbs contract in a common way:

• 확인하였어요 → 확인했어요

This contraction is very common:

• 공부하였어요 → 공부했어요
• 이야기하였어요 → 이야기했어요
• 확인하였어요 → 확인했어요

So 확인했어요 is just the normal spoken/written polite form.

Because 확인했어요 means the checking was already completed.

So the sentence means:

• I checked the dentist appointment time again.
• I confirmed the dentist appointment time again.

If you wanted present or future meanings, you would change the verb:

• 확인해요 = check / am checking
• 확인했어요 = checked
• 확인할 거예요 = will check

In this sentence, the speaker is reporting something they already did.

The subject is omitted, which is very common in Korean.

Korean often leaves out subjects when they are understood from context. So this sentence could mean:

• I checked the dentist appointment time again
• We checked the dentist appointment time again
• He/She checked the dentist appointment time again

But in everyday conversation, if no subject is stated, English translations often use I if the speaker is talking about their own action.

So the missing subject is not strange at all in Korean.

It can mean either, depending on context.

• If you are looking over information to make sure it is correct, it feels like check.
• If you are making sure something is settled or accurate, it can feel like confirm.

In this sentence, both are possible:

• I checked the dentist appointment time again.
• I confirmed the dentist appointment time again.

The difference is mostly in English style, not a big grammatical difference in Korean here.

Yes, you could.

• 다시 확인했어요 = checked again
• 재확인했어요 = rechecked / reconfirmed

재확인하다 sounds a bit more formal or administrative. 다시 확인하다 sounds very natural and common in everyday speech.

So:

• 치과 예약 시간을 다시 확인했어요. = very natural conversational Korean
• 치과 예약 시간을 재확인했어요. = also correct, slightly more formal

The sentence follows a common Korean pattern:

[object] + [adverb] + [verb]

So here:

• 치과 예약 시간을 = the dentist appointment time (object)
• 다시 = again (adverb)
• 확인했어요 = checked (verb)

Korean verbs usually come at the end of the sentence.

So even though English would say:

• I checked the dentist appointment time again

Korean puts the main verb last:

• 치과 예약 시간을 다시 확인했어요

It is similar, but not exactly the same in structure.

• 치과 예약 시간을 다시 확인했어요 = I checked the dentist appointment time again.
• 치과에 예약한 시간을 다시 확인했어요 = I checked again the time I booked at the dentist.

The second version includes 예약한:

• 예약하다 = to make an appointment / reservation
• 예약한 시간 = the time that was reserved/booked

That version is more explicitly built like the time that was booked, while the original is a simpler noun phrase: dentist appointment time.

The original sentence is more compact and very natural.

The plain casual version would be:

• 치과 예약 시간을 다시 확인했어.

The difference is:

• 확인했어요 = polite
• 확인했어 = casual

Everything else stays the same.

So:

• 치과 예약 시간을 다시 확인했어요. = polite
• 치과 예약 시간을 다시 확인했어. = casual

A natural pronunciation would be roughly:

• 치과 → 치꽈
• 예약 → 예약
• 시간을 → 시가늘
• 다시 → 다시
• 확인했어요 → 화긴해써요

So the whole sentence sounds approximately like:

치꽈 예약 시가늘 다시 화긴해써요

A few notes:

• 치과 is commonly pronounced like 치꽈
• 확인 is often heard closer to 화긴 in real speech
• 했어요 sounds like 해써요

These are pronunciation effects, not spelling changes.