Someone who is complacent has become overly content — the junk-food-eating couch potato might be feeling complacent about his health. The literal meaning of this word's Latin root is "very pleased," but even though complacent people may seem pleased with themselves, we are rarely pleased with them.

Can people be complacent?

A complacent person is very pleased with themselves or feels that they do not need to do anything about a situation, even though the situation may be uncertain or dangerous.

What is a complacent person?

adjective. pleased, especially with oneself or one's merits, advantages, situation, etc., often without awareness of some potential danger or defect; self-satisfied: The voters are too complacent to change the government.