DAY6 are back to celebrate their 10th anniversary with their brand-new album, and the title track “Inside Out” reminds us once again why they’re one of K-pop’s most enduring bands. With their signature rock sound, the lyrics capture a painful plea: even when everything feels upside down, will you still love me for life?

Here’s the line we’re diving into today:

“다 알지 않을까?

말이 필요할까?”

“Don’t you already know?

Do we even need words?”

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📝 Key Grammar & Vocabulary

1️⃣ 다 – All / everything

• Used to indicate completeness.

• Here, it stresses: “all of it, everything.”

2️⃣ 알지 않을까? – Don’t (you) know?

• 알다 = to know

• -지 = softener, adds nuance (like “you know, right?”)

• 않을까? = rhetorical question form → “Wouldn’t (you)…?”

→ “Don’t you already know?”

3️⃣ 말이 – Words / speech

• From 말 (speech, words) + -이 (subject particle).

• The subject of the following verb.

4️⃣ 필요할까? – Would it be necessary?

• 필요하다 = to be necessary

• -ㄹ까? = question ending (often rhetorical, wondering)

→ “Would words be necessary?” → “Do we even need to say it?”

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💡 Language Tip:

Notice how both questions end with -ㄹ까?. This ending doesn’t demand an answer but instead expresses doubt, wonder, or expectation — often rhetorical. It’s softer and more emotional than just a plain question. Perfect for lyrics that want to feel rather than simply ask.

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💬 Why It Matters:

In “Inside Out,” DAY6 highlight the kind of intimacy where words almost feel unnecessary — when someone knows you so deeply that your heart speaks louder than anything you could say. It’s raw, vulnerable, and classic DAY6.

🎸 What’s your favorite unspoken lyric moment in K-pop — where the emotion says more than the words? Drop it below ⬇️

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