词根：cast, cest, chast = pure（纯洁）

  词根cast来自拉丁语的cast 意为pure。cest,chast是它的变形，同义词根有来自希腊语的cath。

同源词：

1. chaste adj.（想法、言行等）正派的，高尚的；守贞节的；（文风等）简洁朴实的；纯洁的 *chast<cast(=pure)

2. caste n.印度的世袭阶级；(排他的)社会团体；种姓；等级制度

3. castigate [使拉走得干干净净cast(=pure) + ig(=drive)]
  vt.严惩；严厉批评；责打
  castigation n. 惩罚；责打
  The sergeant castigated the private for not shining his shoes.因为没有擦鞋子，中土严厉地批评了卫兵。

4. chastity n.正派，高尚；纯洁；简洁 *chast<cast(=pure)
  chastity belt 贞节带

5. chasten v.通过惩罚使（犯错误的人）改正（或变得更好）；磨炼（人）；使缓和，遏制；使（文章等）简洁朴实 *chast<cast(=pure)

6. chastise v.惩罚；责骂 *chast<cast(=pure)

7. incest n.乱伦 *in(=not),*chast<cast(=pure)
  incestuous 乱伦的

词根：cast = pure, 表示“纯洁”

caste n. 种姓制度

chaste a. 纯洁的（chast=cast）

castigate v. 惩罚；严厉批评（cast+igate表动词→使…纯洁→惩罚[错误]）

后缀：-aster [名词后缀]

表示人（卑称）

poetaster 劣等诗人

criticaster 低劣的批评家

medicaster 江湖医生，庸医

philosophaster 肤浅的哲学家

词根词缀：-acrasy, -acrasia, -acratia

【来源及含义】Greek: suffix; weakness, weak; powerless; incontinence, lack of control; impotent

【相关描述】The applications of incontinent and incontinence for this unit refer to: lacking self control, uncontrolled; the inability to restrain the passions or appetites, particularly the sexual appetite; indulging in unlawful lust; unchaste; lewd; and in medicine, unable to restrain natural bodily evacuations.

【同源单词】acrasy, copracrasia, phallacrasia, potacrasia, scoracratia, sitacrasia

词根词缀：cast-

【来源及含义】Latin: pure, cut off, to cut off from, separated

【相关描述】A reference to "a race of men" is from Latin casto, "chaste" from castus, "pure, cut off, separated"; past participle of carere, "to be cut off from" (and related to castrate and -cest-).

【相关词根词缀】 Related cutting-word units: castrat-; -cise, -cide; -ectomy; mutil-; put-; sec-, seg-; temno-; -tomy; trunc-.

【同源单词】caste, castigate, castigation, castigatory, chaste, chastely

词根词缀：celiba-, celibat-

【来源及含义】Latin: unmarried; vow not to marry; chaste, morally pure in thought and conduct; that which is considered to be decent and virtuous behavior

【同源单词】celibacy, celibatarian, celibate, celibate, celibate marriage, celibately