annyeong, oneureun gwaenchanha?

안녕 is a casual greeting. In this sentence, it means hi/hello.

A few useful points:

• 안녕 by itself is casual, so you use it with friends, younger people, or someone you are close to.
• It can also be used as bye in casual speech, depending on context.
• The polite version is 안녕하세요 for greeting someone.

So in 안녕, 오늘은 괜찮아?, the speaker is casually saying Hi, are you okay today?

오늘 means today.

The -은 is the topic particle. It marks today as the topic or point of contrast. So 오늘은 is like:

• as for today
• today, at least
• today

In natural English, you usually would not translate -은 directly, but it adds nuance. For example, it can imply:

• How about today?
• Are you okay today, specifically?

This particle often highlights a time, person, or thing that the speaker wants to focus on.

괜찮아? is the casual, friendly style.

Korean has different speech levels, and they show how formal or polite you are being.

• 괜찮아? = casual
• 괜찮아요? = polite
• 괜찮습니까? or 괜찮으세요? = more formal/polite, depending on context

괜찮니? is also casual, but it can sound a bit different in tone. It is often used by someone older or in a position above the listener, or toward a child. 괜찮아? is more neutral and commonly used between friends.

괜찮아? can mean several things depending on context, such as:

• Are you okay?
• Is it okay?
• Are you all right?
• Is that fine?

In this sentence, with 오늘은, it most naturally means something like:

• Are you okay today?
• Doing okay today?

So it is asking about the person's condition, mood, or situation.

Yes, it is natural casual Korean.

안녕, 오늘은 괜찮아? sounds like something you might say to a friend if:

• you are greeting them and checking on them
• you know they may have had a hard time
• you want to ask how they are doing today in particular

A very natural variation would also be:

• 안녕, 오늘은 괜찮아?
• 안녕! 오늘은 괜찮아?
• 오늘은 괜찮아?

The greeting can be included or omitted depending on the situation.

In Korean, subjects and topics are very often omitted when they are obvious from context.

So instead of saying:

• 너는 오늘은 괜찮아?

Korean normally just says:

• 오늘은 괜찮아?

or in this full sentence:

• 안녕, 오늘은 괜찮아?

The listener already knows the question is about you, so saying 너 is often unnecessary. In fact, using 너 can sometimes sound too direct unless the relationship is very casual.

The dictionary form is 괜찮다.

How it changes:

• dictionary form: 괜찮다
• casual present: 괜찮아
• polite present: 괜찮아요

This is a descriptive verb/adjective in Korean, often translated as to be okay, to be fine, or to be all right.

A simple pronunciation guide would be:

• 안녕 ≈ an-nyeong
• 오늘은 ≈ o-neu-reun
• 괜찮아 ≈ gwen-chan-a

A few pronunciation notes:

• 녕 sounds like nyung or nyŏng, not like English neon.
• 오늘은 has a soft flowing sound; the 늘 is not stressed strongly.
• 괜 can be tricky. It sounds roughly like gwen.
• 찮아 is pronounced smoothly together, roughly cha-na with Korean-style vowels.

A full rough guide: an-nyeong, o-neu-reun gwen-cha-na?

It sounds casual, warm, and caring.

Depending on tone of voice, it can feel like:

• a simple friendly check-in
• concern for someone's well-being
• asking whether today is better than before

Because of 오늘은, it can suggest that today is especially important. For example, maybe the person was tired, sick, stressed, or upset earlier, and now the speaker is asking whether they are okay today.

Yes. That is very normal.

Korean often leaves out words like I, you, or it when they are understood from context. English usually needs them, so translators add them naturally.

So even though the Korean sentence does not explicitly say you, the natural English meaning is still:

• Hi, are you okay today?

That is not adding extra meaning in an unnatural way; it is just making the sentence sound normal in English.

You could say:

• 안녕하세요, 오늘은 괜찮아요?

This is the polite version of the same idea.

Breakdown:

• 안녕하세요 = polite hello
• 오늘은 = today / as for today
• 괜찮아요? = polite are you okay?

This would be better for:

• someone you do not know well
• a coworker
• an older person
• someone you want to be respectful toward