1. in a way that causes worry or fear; to a disturbing degree

Examples

• The number of accidents has increased alarmingly this year.
• Her health deteriorated alarmingly after the surgery.
• The water level in the reservoir dropped alarmingly during the drought.
• Test scores have fallen alarmingly in several districts.
• The building was swaying alarmingly in the strong wind.
• Crime rates rose alarmingly in the downtown area.