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Complacent (adjective)
Uncritically satisfied with oneself or one’s achievements; smug.
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Complacent (adjective)
Apathetic with regard to an apparent need or problem.
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Uncomplacent (adjective)
Not complacent.
Wiktionary
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Complacent (adjective)
showing smug or uncritical satisfaction with oneself or one’s achievements
“you can’t afford to be complacent about security”
Oxford Dictionary