Question

complacent 【complacent】adj. 自然的The winner's complacent smile annoyed the loser in the football game.胜利者洋洋自得的微笑使得足球赛的失败者深感厌恶。

Accepted Answer

[kəm'pleɪsnt] 
complacentcontented to a fault with oneself or one's actions
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. They are unconcerned by things that should concern them, and they may neglect their duties. A complacent person might be heard saying, "Ehh, don't worry about it!" — when there really is something to worry about.
All forms of 'complacent' will appear on average once every 655 pages.complacencecomplacencycomplacentcomplacentlyself-complacentself-complacency

Front	complacent
Pron	[kəm'pleɪsnt]
Back	【complacent】 adj. 自然的 The winner's complacent smile annoyed the loser in the football game. 胜利者洋洋自得的微笑使得足球赛的失败者深感厌恶。
Vocab	complacentcontented to a fault with oneself or one's actions 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. They are unconcerned by things that should concern them, and they may neglect their duties. A complacent person might be heard saying, "Ehh, don't worry about it!" — when there really is something to worry about. All forms of 'complacent' will appear on average once every 655 pages. complacence complacency complacent complacently self-complacent self-complacency

Complacent Pleased Worry Kəm'pleɪsnt Adj 自然的 Winner's Smile