appalling · adjective /əˈpɔː.lɪŋ/Full view
appalling
C2 awful, or shocking and very unpleasant or causing someone to feel upset
Dictionary examples:

The animals were being kept in appalling conditions.

This industry has an appalling environmental record.

Both candidates showed an appalling lack of familiarity with the issues.

Learner example:

When Susan got the news of his illness all her joy turned into an appalling despair, and she felt she would die too. (Certificate of Proficiency in English; C2; Spanish)

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