gasareul oe-ul gyeom baendeuui noraereul dasi deureosseo.

겸 means something like while also, as well as, or partly for the purpose of.

In 외울 겸, the speaker is saying they listened again:

• to memorize the lyrics
• and at the same time for another reason too

So the nuance is not just a single, strong purpose like I listened again in order to memorize them, but more like:

• I listened again, also with the idea of memorizing the lyrics
• I listened again as a way of memorizing the lyrics too

It often implies combining two purposes/actions together.

Because 겸 attaches to a form based on the verb stem that functions like a modifier/future-like form.

• 외우다 = to memorize
• stem: 외우-
• 외울 = the form used before 겸

So:

• 외울 겸 = with the intention of memorizing / while also using it to memorize

You cannot say 외워 겸 here.

This is similar to how some other expressions use the -(으)ㄹ form before another word.

They are similar, but the nuance is different.

• 외우려고 = in order to memorize, a clearer and more direct statement of purpose
• 외울 겸 = also to memorize / while I’m at it / partly for memorizing too

Compare the feel:

• 가사를 외우려고 밴드의 노래를 다시 들었어.

  • I listened again in order to memorize the lyrics.
  • Strong, straightforward purpose

• 가사를 외울 겸 밴드의 노래를 다시 들었어.

  • I listened again, also with memorizing the lyrics in mind.
  • Softer, more casual, often suggesting an additional purpose

So 겸 often feels like killing two birds with one stone.

Because there are two different objects belonging to two different verbs.

1. 가사를

   • object of 외우다 = to memorize the lyrics

2. 노래를

   • object of 듣다 = to listen to the song(s)

So the sentence contains:

• 가사를 외울 겸 = with the idea of memorizing the lyrics
• 밴드의 노래를 다시 들었어 = I listened to the band’s song(s) again

Even though only 들었어 is the final conjugated verb, the earlier phrase still contains the object for the implied action 외우다.

가사 means lyrics.

With -를, it becomes 가사를, meaning the lyrics as the object of the verb.

So:

• 가사를 외우다 = to memorize the lyrics

A useful note:

• 가사 is often treated as a singular mass noun in Korean even though in English we usually say lyrics in the plural.
• So 가사 corresponds to English lyrics, not usually a lyric.

의 shows possession or association, similar to English 's or of.

So:

• 밴드 = band
• 밴드의 노래 = the band’s song / the band’s songs

In everyday Korean, 의 is sometimes omitted if the meaning is clear:

• 밴드 노래를 다시 들었어 is also possible in casual speech

But 밴드의 노래 is a little more explicit and structurally clear.

It can mean either, depending on context.

Korean nouns usually do not have to mark singular vs. plural the way English does. So:

• 노래 can mean song
• or songs

In this sentence, English might naturally translate it as either:

• I listened to the band’s song again
• I listened to the band’s songs again

The broader context would decide which sounds best.

다시 means again, and here it modifies 들었어.

So:

• 다시 들었어 = listened again

The speaker is saying they listened to the band’s song(s) another time.

Word order in Korean is flexible, so you might also see:

• 밴드의 노래를 다시 들었어
• 다시 밴드의 노래를 들었어

Both are natural, though the emphasis can shift slightly.

들었어 is the casual/informal polite-low style, often called banmal when used between close friends, younger people, or in casual narration.

• 들었어 = casual
• 들었어요 = polite

So the sentence is in a casual tone.

The same sentence in polite speech would be:

• 가사를 외울 겸 밴드의 노래를 다시 들었어요.

The dictionary form is 듣다 = to listen / to hear.

This verb is irregular:

• 듣다 → stem 듣-
• before a vowel, the ㄷ changes to ㄹ
• so it becomes 들어
• past tense: 들었어

So:

• 듣다
• 들어
• 들었어

This is the same pattern you see in verbs like:

• 걷다 → 걸어
• 묻다 (to ask) → 물어

The basic meaning stays the same even if some parts move, because Korean relies heavily on particles.

Original:

• 가사를 외울 겸 밴드의 노래를 다시 들었어.

Possible variations:

• 밴드의 노래를 가사를 외울 겸 다시 들었어.
• 다시 가사를 외울 겸 밴드의 노래를 들었어.

But the original order is very natural because it presents:

1. the side-purpose first: 가사를 외울 겸
2. then the main action: 밴드의 노래를 다시 들었어

That structure is common in Korean:

• background/purpose first
• main action last

It can be used with both, though the patterns differ.

With verbs, as in this sentence:

• 외울 겸 = also with the intention of memorizing

With nouns, it often means also serving as / doubling as:

• 산책 겸 쇼핑했어.
  • I went shopping while also treating it as a walk.
• 출장 겸 여행
  • a business trip combined with travel

So the core idea of 겸 is:

• combining two roles, purposes, or actions

The sentence sounds very natural and conversational. The speaker is saying they listened to the band’s song(s) again, and one of the reasons was to help memorize the lyrics.

The nuance is lighter than a strict purpose statement. It suggests something like:

• I listened again, partly to memorize the lyrics
• I listened again as a way of memorizing the lyrics too
• I listened again, killing two birds with one stone

So the sentence does not sound overly formal or deliberate; it sounds casual and practical.