complacency

 
Pronunciation: /kəmˈpleɪs(ə)nsi/
(also complacence)

noun

[mass noun]
  • a feeling of smug or uncritical satisfaction with oneself or one’s achievements: the figures are better, but there are no grounds for complacency

Origin:

mid 17th century: from medieval Latin complacentia, from Latin complacere 'to please'