吉(jí)

Origin:

神座（“口”）上面摆着举行隆重仪式时用的礼器——圭，表示有喜庆的事。后来圭形变成了“士”，意思就不明显了。“吉”的本义是好、幸运的。
Sacrificed vessels, or “圭,” would sit atop a sacred base, or “口,” during grand ceremonies. Hence, this character represents a happy thing. Later, “圭” changed into “士,” and its meaning became opaque. The original meaning of “吉” is good and lucky.

Meaning:

lucky, propitious, auspicious

Words:

吉祥(jíxiáng): lucky, propitious, auspicious
吉星(jíxīng): lucky star
吉日(írì): lucky day
吉他(jítā): guitar
吉祥物(jíxiángwù): mascot

Sentences：

1、ZhōngGuórén jiéhūn dōu xǐhuan zhǎo ge jírì.
中国人结婚都喜欢找个吉日。
Chinese people prefer to marry on an auspicious day.

2、Běijīng AoYùnHuì de jíxiángwù shì shénme?
北京奥运会的吉祥物是什么？
What is the mascot for Beijing Olympics?

原文链接