complacency
/kəmˈpleɪsənsɪ/(亦作complacence)
noun
mass noun
- a feeling of smug or uncritical satisfaction with oneself or one's achievements（对自己或自己的成就）自满, 沾沾自喜; 满足：
the figures are better, but there are no grounds for complacency.
算术有进步, 但没有理由自满。
词源
mid 17th cent.: from medieval Latin complacentia, from Latin complacere 'to please'.