Complacency
/kəˈmpleɪsənsi/
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Definition
(noun) A feeling of contented self-satisfaction, especially when unaware of upcoming trouble.
Sentence Examples
His complacency won't make him many friends.
All economic problems would be solved, if they made complacency taxable.
CEFR Practice Quiz
After winning so many local games, arrogant ____ became the teams downfall.