词根：juven = young 年轻, 年少

  来自拉丁语的juven意为young。


同源词：

1. rejuvenate（使重新变年轻 re(=again) + juven(=young)）

  v.（使）变年轻；（使）恢复活力

  rejuvenation       n. [见上，-ition名词后缀] 返老还童

  rejuvenesce       v. [见上，-esce动词后缀] 使返老还童，返老还童

  rejuvenescence   n.  [见上，-escence名词后缀] 返老还童

  rejvenescent       adj. [见上，-escent形容词后缀，…的] (使)返老还童的

  rejuvenator        n. [见上，-ator表示人或物] (使)恢复青春活力的人(或物)

  Those two weeks in florida rejuvenated me. I fell ten years younger.在佛罗里达度过的两周使用我恢复了活力，我感觉自己好像年轻了十岁。

2. juvenile [juven年少，-ile形容词后缀，…的]

  adj.少年的；适合少年的 n.少年

  juvenile appearance 童颜

  juvenile court 少年法庭

  juvenile part/role儿童角色

  juvenile literature 青少年文学

  juvenile delinquent 少年犯

  juvenile delinquency 少年犯罪

例句：

同源词：

1. an increase in juvenile delinquency
青少年犯罪的增加
来自《权威词典》

2. Don't be so juvenile! 别那么孩子气！
来自《权威词典》

3. For a grown man he acted in a very juvenile manner. 身为成年人，他的行为举止显得十分幼稚。
来自《简明英汉词典》

4. The authorities are at their wits' end about juvenile delinquency. 当局对青少年犯罪束手无策。
来自《简明英汉词典》

5. Shortly Tom came upon the juvenile pariah of the village. 不一会儿，汤姆碰上了村里的少年弃儿。

  柯林斯高阶英汉双解学习词典例句：

1. N-COUNT

可数名词  少年

The number of juveniles in the general population has fallen by a fifth in the past 10 years.
总人口中少年所占比例在过去10年中下降了1/5。

2. 用作形容词 (adj.)

少年的；未成年的

Juvenile crime is increasing at a terrifying rate.
青少年犯罪正在以惊人的速度增长。

I'm afraid he'll ultimately become a juvenile delinquent.
我恐怕他最终会成为一名青少年罪犯。

They are holding a forum on juvenile delinquency.
他们正举行一个有关青少年犯罪的讨论会。

He is an expert in juvenile delinquency.
他是研究青少年犯罪的专家。

He wrote down to the juvenile readers.
他为青少年读者写浅显的作品。

For a grown man he acted in a very juvenile manner.
作为一个成年人，他的举止显得十分幼稚。

3. ADJ-GRADED
能被表示程度的副词或介词词组修饰的形容词
（行为）幼稚的，不成熟的，孩子气的

He's a typical male, as he gets older he becomes more juvenile.
他是个典型的男人，年龄越大越孩子气。

4. N-COUNT
可数名词
幼仔；幼兽;雏鸟 Young animals are sometimes referred to as juveniles .

5.用作名词 (n.)
They are holding a forum on juvenile delinquency.
他们正举行一个有关青少年犯罪的讨论会。
 
He wrote down to the juvenile readers.
他为青少年读者写浅显的作品。

At first this shop sold newspapers and magazines only, but it has since put in juvenile books.
这家商店起初只出售报纸和杂志，后来又增售青少年读物。

词根：alesc (esc, alit, olesc) = becoming

  词根alesc来自拉丁语的alesc意为becoming。growing,esc,alit,olesc是它的变形。

同源词：

1. coalition（变成一起co<com(=together) + alit<alesc(=becoming)）
  n.联合；（政党间的）联盟
  coalesce n.联合
  A coalition nations attacked Iraq in 1991. 多国联军于1991年攻击了伊拉克。

2. adolescence
  n.青春期 *ad( = to ,toward),olesc,alesc(=becoming)
  The period of adolescence has fascinated people of all ages. 青春期阶段总是使各个年龄的人都着迷。

3. adolescent
  adj.青春期的 n.青少年 *ad( = to ,toward),olesc,alesc(=becoming)
  Aristotle characterized the adolescent as being "high-minded",but somewaht put this down to lack of experience. 亚里士多德认为青少年的特点是“高洁的”，但他也认为这在某种程度上缺乏经验。

4. florescence
  n. 开花，盛开；花期，全盛期 *flor (=flower),esc<alesc(=becoming)
  florescent adj.开花的，花盛开的

5. fluorescent
  adj.发荧光的，荧光性的 *fluor(=bloom),esc<alesc(=becoming)
  fluorescence n.荧光性
  fluorescent lamps /lighting 荧光灯/荧光照明

6. phosphorescence
  n.发磷光；磷光 *phos(=light),phor(=carry,produce),esc<alesc(=becoming)
  phosphorescent adj.发磷光的，磷光性的

词根：prag-, pract- = to do, act 做事

  来自希腊语的prag,pracit意为to do ,business。

同源词：

1. pragmatic adj.实际的；实用主义的；实干的（不管什么都做的prag(=do,business)）
  pragmatism n.实用主义 pragmatist n.实用主义者
  The pragmatic decision is to forgo the vacation and study.务实的决定是放弃休假去学习。

2. practice n.实行；实施；实践；常规，惯例；习惯；练习；（医生、律师的）业务；诉讼手续 v.练习；实习；习惯做...;从事（职业）
  practiced adj.熟练的；老练的
  practice teacher （本人是学生的）实习教师；put a plan into practice 将计划付诸实施；practice medicine/law行医/做律师

3. practical adj. 实际的；实用的；（比起理论）注重行动的；实践的；事实上的，实际上的
  practically adv.实际地；实用地；事实上；几乎；have practically no fine weather 几乎没有好天气；practicality 实用性；实际事物；Let's get down to practicalities.让我们老虎一下实际；practical joke玩笑；恶作剧

；practical English 实用英语 ;practical knowledge 实用知识；ideas that appeal to practical minds 讲求实用义的想法

4. practicable adj.适用的；能实行的；可通行的
  practicably adv.可实行地
  practicability n.可行性
  methods that are not practicable 不可行的方法；mountain pass that is practicable only in summer只能在夏天通行的山路。

5. practitioner n.开业者（尤指医生、律师等）；从业者；实践者；（基督教科学派的）信仰疗法术士
  general practitioner （缩写：GP）（普通医生（相对于专科医生而言））

词根词缀：zelo-, zel-; zeal-

【来源及含义】Greek > Latin: ardor, fervor; jealousy, jealous

【相关描述】Etymologically, jealousy and zeal came from the same source. Both originally came from Greek zelos. This passed into post-classical Latin as zelus, which later produced the adjective zelosus. Old French incorporated this as gelos or jelous and passed it on to English.

The Greek word denoted "jealousy" and "fervor, enthusiasm", and it is this strand of meaning that has come down to us as jealous. Jalousie was the French equivalent of jealousy. Most of the words that became distinctive terms for "jealousy" were originally used in a good sense of "zeal" and "emulation".

【相关词根词缀】Related religious-word units: church; dei-, div-; ecclesi-; fanati-; hiero-; idol-; -olatry; theo-.

【同源单词】jealous, jealous, jealously, jealousness, jealous-type paranoia, jealousy