词根：greg = flock, gather, mob 群 / 聚结

  词根拉丁语gregare(=to collect),grex(=flock 群）。有同类词根：-cumul- 堆积，来源于拉丁语 cumulus，如：accumulate 堆积起来、cumulative 累计；它相应的希腊语词根为：-soro- 堆积，如：soroche 高山病、sororiation 乳房增大。

同源词：

1. egregious（脱离人群的 e<ex(=out) + greg(=flock,mob)）
  adj.极坏的；异乎寻常的
  egregiously adv.极坏地
  The bassoon soloist made several egregious mistakes at the recital. 那个低音管独奏会上出现了几次极大的失误。

2. gregarious（因成群而充满的greg(=flock,mob)）
  adj.群居的，集体的；合群的；爱社会的
  I tend to be lost in the shadow of my gregarious friend. 同我善于社交的朋友在一起，我会不知所措。

3. segregate（使脱离于群 se(=away) + greg(=flock,mob)）
  vt. 分离，隔离；实行种族隔离
  segregation n.分离，隔离；种族隔离
  segregationist n.各族隔离主义者
  You need to segregate the bitch from the other dogs when she's in heat. 当母狗发情时，你需要把它和其他的狗隔离开来。

4. aggregate
  v.聚集，集合；总计达 n.合计，总数，总额；（混凝土的）骨料
  adj.总计的，合计的 *ag<ad(=to,near)
  aggregation n.集合体，集成体
  The money collected aggregated $1,000. 筹集的奖金总计1000美元。
  in the aggregate 总计
  aggregate demand 总需求

5. congregate
  v.（使）集合 *con<com(=together)
  People quickly congregated around the speaker. 人们很快就聚集到了演说者周围。

6. congregation
  n.会集，集合；（教堂的）会众（通常牧师、对歌队除外）；（宗教的）集会 *con<com(=together)

7. congregational
  adj.（教堂）会众的；集合的；（C~)（基督教）公理会的 *con<com(=together)

8. desegregate
  v.废除种族隔离 *de(=reverse the action of),se(=away)
  desegregation n.废除种族隔离
  desegregate schools Alabama 亚拉巴马州取消种族隔离的学校。

词根词缀：a-, ab-, abs-

【来源及含义】Latin: prefix; from, away, away from

【相关描述】This prefix is normally used with elements of Latin and French origins (abs- usually joins elements beginning with c, q, or t).

The form ab- is regularly used before all vowels and h; and it becomes a- before the consonants m, p, and v. The prefix apo- has similar meanings.

This list is a very small sample of the multitudes of a-, ab-, abs- prefixes that are available in dictionaries and those in this unit are only meant to present a few examples.

【同源单词】abampere, abampere centimeter squared, abampere per square centimeter, abarticular, abarticulation, abbreviate

词根词缀：bomba-, bomb-

【来源及含义】Greek > Latin: bambacium, "cotton fabric"; from bombax, "cotton"; from Latin, bombyx, "silk, silkworm"; from Greek, bombux, "silkworm"

【同源单词】bombast, bombaster, bombastic, bombastical, bombastically, bombasting

词根词缀：-ian

【来源及含义】Latin: suffix form of -an from -ianus, a modifier of the main word to which it is attached: belonging to, coming from, being involved in, or being like something

【相关描述】Appearing in such words as comedian, egalitarian, Bostonian, Italian, Smithsonian, mathematician, Alabamian, Californian, Arizonian, and Canadian. It is attached to the root of common or proper nouns with the meanings "of, pertaining to, from", or "like" the proper name appearing in the stem.

【同源单词】abecedarian, academician, acanthopterygian, acararian, acoustician, aeolian