English rendering put on a stern expression Literal translation: “set one’s facial color straight”
To display a solemn look or expression on one’s face.
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Writing text얼굴빛을 바로잡다
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A silent film that writes the headword and its meaning.
Be written on one’s face For feelings, mood, or the like to show on one’s face 
Have a yellow, sickly face Have a yellowed face showing strong signs of illness. 
2 meanings touch up makeup or change one’s demeanor To apply makeup again. 
Show one’s face Appear at a gathering or similar occasion 
Shared · 3 Face others without shame Meet others confidently and honorably. 
Shared · 2 consider someone’s dignity To take someone’s standing or dignity into account. 
Be brazen-faced Figuratively, be shameless and brazen 
Shared · 3 Be widely acquainted Know many people socially. 
Shared · 5 be shameless To have no shame or sense of decency. 
Turn scarlet with excitement Become so excited that one’s face turns deep red Browse in Hangul order.
WORDROW Korean Idioms