English rendering Nod off Literal translation: “Pound the head-mill”
Unconsciously nod one’s head while dozing from sleepiness, standing or sitting
Dictionary example 1
졸려서 고갯방아를 찧다 .
Read the meanings, trace, then cover above the masking line and write. Uncover, choose a meaning, and make your own sentence.
Writing text고갯방아를 찧다
Explore the body parts or scenes linked to this idiom.
A silent film that writes the headword and its meaning.
Rack one’s brains Vulgarly, think extremely hard or worry intensely 
Shared · 2 Rack one's brains Strain greatly over something and become absorbed in thought. 
Shared · 2 rack one’s brains To think so intensely that one’s head aches because one does not know what to do. 
With all one's might Disparagingly, with all one's strength. 
rack one’s brains Disparagingly, to agonize over something and think about it intently. 
Rack one’s brains Disparagingly, pay attention to a problem and think it over or work hard at it 
Agonize over what to do Disparagingly, become absorbed in thinking to the point of a headache because one does not know what to do. 
Shared · 4 be empty-headed A disparaging expression meaning to lack judgment or insight. 
Wear oneself out worrying Disparagingly, think very hard or fret greatly. 
Shared · 2 Agonize over a problem Think intensely, to the point of a headache, because one does not know what to do Browse in Hangul order.
WORDROW Korean Idioms