abnormal · adjective /æbˈnɔːr.məl/Full view
Nouns: normality/normalcy, abnormality, normalcy
Adjectives: normal, abnormal
Adverbs: normally, abnormally
C1 different from what is normal or usual, in a way which is strange or dangerous
Dictionary examples:

abnormal behavior/conditions

We had an abnormal amount of snow.

Learner example:

You are all obliged to inform other worker[s] about the danger if you should notice anything that is abnormal. (Certificate in Advanced English; C1; Polish)

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