전전반측이 · 전전반측을
tossing and turning, being unable to sleep
Example
내일 시험이 걱정돼서 밤새 전전반측했어요.
I was so worried about tomorrow's exam that I tossed and turned all night.
Word parts
전 roll+전 turn+반 reverse+측 side
From an ancient Chinese poem: rolling from side to side, unable to sleep.
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