벌초가 · 벌초를
tidying ancestral graves (cutting the grass), grave weeding
Example
추석 전에 가족들과 벌초를 하러 시골에 가요.
Before Chuseok, I go to the countryside with my family to tidy the graves.
Word parts
벌 cut+초 grass
Literally 'cutting grass' — done on family graves before Chuseok.
Good to know
News often warns about bee stings and snakes during 벌초 season in late August and September.