Hillary 的意思与“喜”有关，表示cheerful, glad “快活的、高兴的”，最终来自希腊语，它是Hilary 的变体，顺便可以学习三个词：

　　hilarious（hilar 幸福，高兴，-ious  形容词后缀）

　　a. 欢闹的；狂欢的；引人狂笑的

　　He didn't like the film at all - I thought it was hilarious.

　　We thought it was hilarious when we first heard about it.

　　hilarity（见上，-ity名词后缀）

　　n. 欢闹，狂欢

　　What was all the hilarity about ?

　　Eva joined in the hilarity as much as anyone.

　　exhilarate（ex- 完全地，hilar高兴，-ate使…）

　　vt. 使高兴，使兴奋，使激动

　　Dan felt strangely exhilarated by the day's events.

　　We felt exhilarated by our walk along the beach.

　　Our first parachute jump was an exhilarating experience.

　　幸福和“傻”经常是有联系的，“傻”一点也许会幸福，请看：

　　hilar 是词根hil 带后缀的变体，而hil 和silly 词源上相关。

　　silly（sill? 完整，幸福，-y 充满…的；本表示幸福的→纯真的、天真无邪的→简单的→头脑简单的→）

　　a. 傻的，糊涂的

　　Hillary, silly, safe，save，salvage，salvation，salute 等词源上都有关系。