词根：gon = to compare, to test, angle

  来源于希腊语 gonia, 意为to compare,to test,angle。有异形同义词根：angul ,angl ,corn 角。


同源词：

1. paragon （来到旁边成为比较的对象 para(=beside) + gon(=compare,test,angle)）
  n.模范，榜样，典范
  Priestes are supposed to be paragons of virtue,though that's not always so. 牧师被认为是美国的典范，尽管实际上并非总是如此。

2. diagonal
  n./adj. 对角线（的）；倾斜（的） *dia (=across)

3. trigonometry
  n.[数]三角 tri (=three),metr<meter(=measure)

4. pentagon
  n.五边形；(the P~)美国五角大楼 *penta(=five)
  pentagonal adj.五边形的
  Pentagon officials 五角大楼官员

5. hexagon
  n.六边形；(the H~)法国（从地图上看，法国近似六边形） *hexa (=six)
  hexagonal adj.六边形的
  Within the Hexagon there are 96 departments. 法国有96个省。

6. octagon
  n.八边形  *octa (=eight)
  octagonal adj.八边形的

7. polygon
  n.多边形 *poly(=many)
  regular polygon 正多边形

词根词缀：doul-, dulo-, dul-

【来源及含义】Greek: slave, servile, slavish; servitude; serving

【相关描述】A doula supports a woman and her family in achieving the kind of birth that they desire. A doula works in homes, hospitals, and birth centers; and gives, emotional, physical, and informational support. A careprovider, be he/she a midwife, OB/gyn, or family practitioner, will take care of a woman's prenatal care and birth. A doula is supposed to ensure that someone is always available to look after the mother-to-be emotionally. These objectives are facilitated by communication between the laboring woman, her partner, and her clinical care providers.

As a supportive companion (other than a friend or loved one) a doula is professionally trained to provide birth-labor support. She performs no clinical tasks. A doula also refers to lay women who are trained or experienced in providing postpartum care—mother and newborn care, breastfeeding support and advice, cooking, child care, errands, and light cleaning—for the family. To distinguish between the two types of doulas, one may refer to "birth doulas" and "postpartum doulas".

【同源单词】doule, doulios, doulos, dulia, dulocracy, hierodule

词根词缀：ex-, ec-, e-

【来源及含义】Greek: out of, out, outside; away from; used as a prefix

【相关描述】This is a prefix that is supposed to be used with words or roots of Greek origin. The ex- form is used before vowels or h; ec- goes before consonants.

【同源单词】acentric, eccentric, eccentric, eccentric vision, eccentricity, ecclesia