形容詞 complacent:

1. contented to a fault with oneself or one's actions
   同義詞：self-satisfied, self-complacent

1. His book was an eye opener to complacent young men.
   對(duì)自滿(mǎn)的年輕人來(lái)說(shuō)，他的這本書(shū)有啟發(fā)作用。
2. He shows a complacent smile.
   他得意地笑了。
3. We must not be complacent about our achievements.
   我們決不能滿(mǎn)足于自己的成績(jī)。

com.pla.cent

adj.（形容詞）
Contented to a fault; self-satisfied and unconcerned:
自滿(mǎn)的：對(duì)缺點(diǎn)的滿(mǎn)意；自我滿(mǎn)足且不關(guān)心：
例句：
He had become complacent after years of success.
成功多年后他變得自我滿(mǎn)足起來(lái)

Eager to please; complaisant.
期望取悅的；殷勤的

來(lái)源：
Latin complacôns complacent- [present participle of] complacôre [to please]
拉丁語(yǔ) complacôns complacent- [] complacôre的現(xiàn)在分詞 [取悅]
com- [intensive pref.] * see com-
com- [前綴，表加強(qiáng)詞義] *參見(jiàn) com-
placôre [to please] * see pl3k-
placôre [取悅] *參見(jiàn) pl3k-

【引伸】
compla.cently
adv.（副詞）