i banjineun yeppeugo jeo mokgeorido jal eoullyeo.

They are demonstratives:

• 이 = this, something near the speaker
• 저 = that over there, something farther away from the speaker

So:

• 이 반지 = this ring
• 저 목걸이 = that necklace over there

A learner might expect 그 for that, but 저 is specifically used for something more distant.

는 is the topic particle. It marks 반지 as the thing being talked about: as for this ring...

So 이 반지는 has a nuance like:

• As for this ring, it’s pretty...
• This ring, ...

Using 가 would sound more like simply identifying the subject. Using 는 often adds a topic or contrast feeling, which fits well here because another item, 저 목걸이도, is mentioned afterward.

도 means also or too.

So 저 목걸이도 means:

• that necklace too
• that necklace also

It shows that the speaker is adding the necklace as another item in the discussion. The sentence is not just about the ring; the necklace is being included as well.

예쁘고 is the -고 connective form of 예쁘다.

The ending -고 links one clause to another and often means and:

• 예쁘고 = is pretty, and...

So the speaker is not ending the sentence after pretty. They are continuing on to say something else.

Compare:

• 예뻐요. = It’s pretty.
• 예쁘고... = It’s pretty, and...

This is a very common way to connect descriptions in Korean.

Usually here, yes. In this sentence, -고 is simply connecting two ideas:

• This ring is pretty
• That necklace also suits well

It does not strongly mean because. If the speaker wanted a clearer because/since feeling, they might use something like -아서/어서 instead.

So in this sentence, 예쁘고 is best understood as a neutral connector: pretty, and...

어울리다 means things like:

• to suit
• to go well with
• to match
• to look good on someone

잘 means well, so 잘 어울려 means:

• suits well
• goes well together
• looks good

Depending on context, it could mean:

• the necklace suits the person
• the necklace matches the ring
• the necklace goes well with the outfit or overall look

Korean often leaves that unstated if it is obvious from the situation.

Korean often omits subjects and objects when they are understood from context.

So 저 목걸이도 잘 어울려 could mean several slightly different things depending on the situation:

• That necklace looks good on you too.
• That necklace also matches well.
• That necklace goes well with it too.

English usually forces you to be more explicit, but Korean often does not. Native speakers rely on context to understand what is being matched or who it suits.

어울려 is a casual, informal ending.

The dictionary form is 어울리다, and in casual speech it becomes 어울려.

Compare:

• 어울려 = casual
• 어울려요 = polite
• 어울립니다 = formal

So this sentence is in a casual style, probably said to a friend, family member, or someone the speaker is close to.

Yes, there can be.

Because 는 often gives a topic or contrast feeling, 이 반지는 can sound a bit like:

• As for this ring, it’s pretty
• This ring is pretty, and...

Then 도 adds the necklace:

• and that necklace too...

So the sentence feels like the speaker is looking at more than one accessory and commenting on how they look together or how each one works in the situation.

Yes. That is a very natural interpretation.

Because Korean leaves so much unstated, 저 목걸이도 잘 어울려 can mean:

• the necklace suits you
• the necklace matches the ring
• the necklace goes well with the whole outfit

All of these are possible. The exact meaning depends on the real-life context.

If the speaker wanted to make it explicit, they could say something like:

• 너한테 잘 어울려 = It suits you well.
• 이 반지랑 잘 어울려 = It goes well with this ring.

Because Korean is a context-heavy language. If the speaker and listener can already tell:

• who is wearing the items
• what items are being compared
• what 어울리다 is referring to

then Korean usually does not repeat that information.

This is very normal and very common. For English speakers, it can feel incomplete at first, but in Korean it sounds natural rather than vague.