- 류두 (ryudu)
- a midsummer festival of obsolete Korean tradition held on the 15th of June of the lunar calendar. Remarkably, people washed their hair in rivers especially flowing eastward, hence the name.
- 유두물 (-mur, -mul) rainfall around the festival
- 유두벼 (-byeo) rice crop dedicated to the ancestors
- 유두연 (-宴, -yeon) open-air party of the festival
- 여름 (yeoreum) summer
- 겨울 (gyeour, -l) winter