词根：void = empty

  来自拉丁语的void意为empty,同义词根有来自拉丁语的vac,van以及来自盎格鲁-撒克逊语的wan等。

同源词：

1. devoid（完全空着的 de(=intensive) + void(=empty)）
  adj.没有...的；缺乏的
  The lunar landscape is devoid of color. 月球上的风景是没有颜色的。

2. avoid
  v.避免，逃避 *a(=off)
  avoidable adj.可以避免的

3. avoidance
  n.回避 *a(=off)
  the avoidance of had companions 回避不好的朋友
  avoidance of taxation 避税
  adj.空的；空闲的；（~of）没有的，缺乏的；[律]无效的 n.空间；空虚感；空地 v.使无效
  viod hours 空闲时间
  subject void of interest 乏味的主题
  null and void 无效的

词根：comit = to accompany

  来自拉丁语的comit意为to accompany 。同义词根有来自拉丁语的soci。

concomitant （一起的朋友con<com(=together) + comit (=companion)）
  adj.伴随的
  n.伴随物
  concomitance 伴随，共存
  I recommend concomitant radiation therapy and chemotherapy.我建议同时使用放疗和化疗。

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：pan-

【来源及含义】Latin: panis, bread

【同源单词】accompaniment, accompany, companion, companionable, companionship, panarium

词根词缀：social-, socia-, soci-, socio-

【来源及含义】Latin: companion, partner, ally, comrade; interpersonal relationships, living with others, allied, associated; characterized by friendliness or geniality

【同源单词】anthroposociologist, anthroposociology, asocial, associate, association, associative

词根词缀：sodali-

【来源及含义】Latin: fellowship, friendship, companionship; companions; brotherhood

【同源单词】sodalism, sodalist, sodalitate, sodality, sodalize