경보가 · 경보를
alarm, warning, alert
Example
태풍 경보가 내려져서 학교가 문을 닫았어요.
A typhoon warning was issued, so schools closed.
Word parts
경 warn+보 report
Literally 'warning report.'
Good to know
For weather, 주의보 (advisory) is milder and 경보 (warning) is more serious.
Related words