야단쳐요 · 야단쳤어요 · 야단칠 거예요 · 야단치세요
to scold, to tell off
Example
엄마가 늦게 들어온 동생을 야단쳤어요.
Mom scolded my little brother for coming home late.
Word parts
야단 'fuss, uproar' + 치다; 야단났다 means 'We're in big trouble!'
Good to know
The receiving side is 야단맞다: 선생님께 야단맞았어요 = I got scolded by the teacher.