plural complacencies
Definition of complacency
1
: self-satisfaction especially when accompanied by unawareness of actual dangers or deficiencies
When it comes to safety, complacency can be dangerous.
2
: an instance of usually unaware or uninformed self-satisfaction
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Merriam-Webster unabridged
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Time Traveler for complacency
The first known use of complacency was in 1650
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