1. in a way that causes shock or dismay; extremely badly

Examples

• The restaurant’s service was appallingly slow.
• She was appallingly rude to the new student.
• The building had been appallingly neglected for years.
• His behavior at the meeting was appallingly unprofessional.
• The test results were appallingly poor across all grade levels.
• The conditions in the shelter were appallingly inadequate.