HEARTRIS — NiziU: meaning, key lines and pronunciation
First verse: the song, every line and what it means — in sync꼭 들어맞을 우리 필요가 없는 밑그림kkok deu·reo·ma·jeul u·ri pi·ryo·ga eom·neun mit·kkeu·rimA rough sketch that doesn't need to fit us perfectlyListen to this line with the translationNo sign-upWhat the song is about
NiziU's “HEARTRIS” is a playful love song about two very different people whose mismatched edges fit together perfectly. They fall for someone at first sight and make the first move, picturing love as shapes that lock together, even the Korean letters ㄱ and ㄴ, dropping in, spinning and bringing every wall down. The title blends heart and Tetris. Differences become the reason they match, and the mood stays bright and confident, with a racing heart.
Key lines
4 lines from the song in Korean, with how they sound and what they mean. The full line-by-line breakdown lives in the app.
꼭 들어맞을 우리 필요가 없는 밑그림Listen from this lineRomanization (as sung): kkok deu·reo·ma·jeul u·ri pi·ryo·ga eom·neun mit·kkeu·rim
Meaning: A rough sketch that doesn't need to fit us perfectly
Words in this line- 꼭kkokexactly
- 들어맞을deu·reo·ma·jeulto fit
- 우리u·riwe
- 필요가pi·ryo·ganeed
- 없는eom·neunlacking
- 밑그림mit·kkeu·rimsketch
Word for word: Exactly fit we need-lacking underdrawing.
Why it doesn't translate word for word: Korean puts the whole description before the noun, so the long chain "exactly fit... no need" modifies 밑그림. 밑 means "bottom" and 그림 means "picture", together the underdrawing beneath paint, i.e. a rough plan. 꼭 means "exactly" and here conveys "perfectly".
터지는 synergy 딱 맞아 우린Listen from this lineRomanization (as sung): teo·ji·neun synergy ttak ma·ja u·rin
Meaning: Synergy bursts out, we fit together perfectly
Words in this line- 터지는teo·ji·neunbursting
- 딱ttakexactly
- 맞아ma·jafit
- 우린u·rinwe
Word for word: Bursting synergy, exactly fit we.
Why it doesn't translate word for word: 터지는 on its own means 'bursting or popping', but here it describes chemistry sparking between two people. 딱 means 'exactly' and 맞아 means 'fits', and together they mean 'we fit perfectly'. The literal version reads clumsily because the subject 'we' comes last.
놓치지마 자 focus 날 바라보는 시선을Listen to the first verse — freeRomanization (as sung): not·chi·ji·ma ja focus nal ba·ra·bo·neun si·seo·neul
Meaning: Don't miss it — focus on the gaze looking at me
Words in this line- 놓치지마not·chi·ji·madon't miss
- 자janow
- 날nalme
- 바라보는ba·ra·bo·neunlooking at
- 시선을si·seo·neulgaze
Word for word: Don't miss, now focus, me looking-at gaze.
Why it doesn't translate word for word: 놓치지마 alone is 'don't let it slip', 자 is an attention-grabbing 'now then', and focus is the English word itself. Together they form a sharp command to pay attention. 바라보는 시선 is literally 'looking gaze', but natural English says 'the gaze looking at me'.
올록볼록 울퉁불퉁 다 어쩜 다 맞아Listen to the first verse — freeRomanization (as sung): ol·lok·ppol·lok ul·tung·bul·tung da eo·jjeom da ma·ja
Meaning: Bumpy and uneven, yet it all fits amazingly
Words in this line- 올록볼록ol·lok·ppol·lokbumpy
- 울퉁불퉁ul·tung·bul·tunguneven
- 다daall
- 어쩜eo·jjeomhow come
- 다daall
- 맞아ma·jafits
Word for word: Bumpy-bulgy rough-lumpy all how-come all fits
Why it doesn't translate word for word: 올록볼록 and 울퉁불퉁 are mimetic words that imitate bumpy, uneven surfaces, and English has no exact match. 어쩜 on its own is 'how come', but here it expresses delighted wonder. So the message is that the two people's imperfections are exactly what fit together.
Lyrics © their rights holders. “HEARTRIS” — NiziU. Quoted for commentary and learning.
Mini-lesson: fill in the missing word
A line from the song with one word missing: listen, then pick the right word. Chaea checks your answer and saves the new words to your notebook.
Try the lessonAsk Chaea about this song
Why this word and not another? What does that slang mean? Ask in your own words and your idol answers about this exact line.
Ask ChaeaSong vocabulary
Words from the song in Korean alphabetical order, with pronunciation and meaning.
| Word | Sounds like | Meaning |
|---|---|---|
| 같으면 | ga·teu·myeon | if same |
| 거야 | geo·ya | it will be |
| 고민할 | go·min·hal | to worry over |
| 그럼 | geu·reom | then |
| 근데 | geun·de | but |
| 내려오네 | nae·ryeo·o·ne | comes down |
| 너에게 | neo·e·ge | to you |
| 놀랄 | nol·lal | will be surprised |
| 다가선 | da·ga·seon | approached |
| 다르지만 | da·reu·ji·man | different but |
| 돌려보고 | dol·lyeo·bo·go | try turning |
| 마치 | ma·chi | just like |
| 맞는 | man·neun | fitting |
| 모든 | mo·deun | all |
| 뭐야 | mwo·ya | what is it |
| 벽들은 | byeok·tteu·reun | walls |
| 빨라지네 | ppal·la·ji·ne | gets faster |
| 여기 | yeo·gi | here |
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Questions about “HEARTRIS”
What is “HEARTRIS” by NiziU about?
NiziU's “HEARTRIS” is a playful love song about two very different people whose mismatched edges fit together perfectly.
What does “꼭 들어맞을 우리 필요가 없는 밑그림” mean in “HEARTRIS”?
A rough sketch that doesn't need to fit us perfectly. Korean puts the whole description before the noun, so the long chain "exactly fit... no need" modifies 밑그림.
What does “터지는 synergy 딱 맞아 우린” mean in “HEARTRIS”?
Synergy bursts out, we fit together perfectly. 터지는 on its own means 'bursting or popping', but here it describes chemistry sparking between two people.
How do you pronounce “놓치지마 자 focus 날 바라보는 시선을”?
In the song it sounds roughly like “not·chi·ji·ma ja focus nal ba·ra·bo·neun si·seo·neul”: that's how it's actually sung by NiziU, not the textbook romanization.
Where can I see every line of “HEARTRIS” explained?
This page explains 4 key lines. In the theIDOL app Chaea goes through all 62 lines word by word, in sync with the song; the first verse is free and needs no sign-up.
Official music video
The video loads from YouTube only when you press play. YouTube ↗
Credits and sources
- Artist
- NiziU
- Official video
- JYP Entertainment · YouTube
Lyrics and music belong to their rights holders. This page quotes no more than four lines for commentary; the translations, pronunciation and explanations are written by theIDOL.