Complacency is smug satisfaction that stops you noticing danger. Guard against complacency, a dangerous complacency, no room for complacency.
It is always a warning, and safety reports name it as a cause more often than incompetence. The difference from contentment is the blindness: complacency is being pleased when you should be watching.
1nouncomplacencySmug satisfaction that stops you noticing danger.
“After winning so easily, the team's complacency cost them the next match.”
complacency is a satisfaction.
Latin complacentia means pleasingness, from complacere, to be very pleasing.
Latin
complacentia
Middle English
complacence
English, today
complacency
Late Middle English complacence, from Latin complacentia. Compare French complaisance.
Etymology from Wiktionary, CC BY-SA