aberration
🇺🇸
/ˌæbəˈreɪʃn/
🇬🇧
/ˌæbəˈreɪʃn/
An unusual or unexpected event or behavior that deviates from what is normal or expected.
The teacher was surprised by the student's aberration, as he was usually well-behaved.
老师对学生的反常行为感到惊讶,因为他通常表现得很好。