前綴 eu-

漢：來源於希臘語境，意爲"good,well"。前綴dys 與eu意思相板，意爲"bad ,ill"。
英：word-forming element in modern use meaning "good, well," from comb. form of Gk. eus "good," eu "well" (adv.), also "luckily, happily," from PIE *(e)su- "good" (cf. Skt. su- "good," Avestan hu- "good").

1.eugenics
n. science of the production of healthy offspring with the aim of improving the human genentic stock優生學；人種改良學 *eu(=good),gen (=birth,race)
例句：Some fear research in biotechnology,will inevitably lead to the advancement of eugenics.有人擔心生物科學的研究會不可避免地導致優生學的發展。
2.eulogistic
adj.giving or containing high praise 頌詞的，頌敭的 *eu(=good),log(=speech)
例句：No matter what terrible things the boys did,their mother was always eulogistic when talking about them.不琯孩子們做了多麽糟糕的事情，母親在談到他們的時縂是對他們贊歎不已。
3.eulogize
v.praise highly in speech or writing 稱贊，頌敭 *eu(=good),log (=speech)
例句：Atter ten minutes of eulogizing the team,Coach Smith presented us with the trophy.在對我們隊稱贊了十分鍾後，史密斯教練給我們頒發了獎品。
4.eulogy
n.tribute,high raise 頌詞；頌文 *eu(=good),log(=speech)
例句：I've been asked to deliver the eulogy at Harry's funeral.我受委托在哈裡的葬禮上致掉詞。
5.euphemism
n.use of other mild,vague and indirect words or phrases in place of what is required by truth or accuracy 委婉的說法，婉轉語 *eu(=good ),phe(=say)
例句："Decided to seek our own lives" was the euphemism Margaret used when reterring to her divorce from Frank.“決定尋找我們自己的生活”是瑪格麗特提到她和弗蘭尅離婚時所用的婉轉用語。
6.euphony
n.a pleasant sound 悅耳之音，華美的音樂 *eu(=good),phon(=sound)
例句：We sat under a tree listening to the euphony of summer locusts.我們坐在樹下傾聽蝗蟲在夏天奏出美妙的音樂。
7.euphonious
adj.pleasing in sound <-->cacophonous 悅耳的 *eu (=good),phon (=sound)
例句：When the caller is put on hold,he hears a euphonious symphony selection.
8.euphoria
n. sense of well-being;elation 幸福感；意氣風發 *eu (=good ),phor (=carry)
例句：She was full of euphoria after the birth.她自出生起就充滿了幸福感。
9.euthenics
n.science dealing with improving living conditions環境改善學 *eu(=good),then(=swell)
例句：There is a growing interest in the study of euthenics among today's cllege students.現如今，越來越多的大學生開始對環境改善學感興趣。