词根：err(arr) = to wander（漫游）

  来源：①来源于拉丁语 errare 徘徊，arr是它的变形。如果你“漫游”的脱离了正道，太离谱，当然会“犯错误”，所以该词根所构成的词汇有很多都含有“犯错”的含义；②来源于拉丁格言：Errare humanum est．即：人非圣贤，孰能无过；③来源于字母的含义，e 代表“眼睛”，r 代表“树枝”，理解为：眼看着大树的树枝不断漫无边际地双倍向外生长。
  同义词根有来自拉丁语的plan和来自希腊语的vag,异形同义词根是：-vag- 徘徊，迷失。

同源词：

1. arrant
  adj.足的；臭名昭著的，声名狼藉的
  arrant thief 臭名昭著的小偷
  arrant fool 十足的傻瓜
  arranf rogue  十足的恶棍
  arrant nonsense 一派胡言

2. err
  v.犯错：出差错

3. errand
  n.差事
  a fool's errand 白跑腿的差事
  errand boy 供差遣的童仆
  run errands 跑腿

4. errant
  adj.犯错误的，诶人歧途的
  errant husband  犯了错误的丈夫

5. erratic
  adj.古怪的；无规律的；无固定路线的
  erratic star 运行轨道不定的星星

6. erratum
  n.书写错误，印刷错误
  errata (erratum的复教)

7. erroneous
  asdj.错误的，不正确的

8. error
  n.错误，过失，失误
  clerical error 誊写工作中的笔误
  fall into error 误入歧途
  printer's errors 印刷错误
  error of judgment 判断错误

9. unerring
  adj.反正确无误的；没有偏差的 *un(=not)
  fire with unerring aim 瞄准射击
  strike an unerring blow 击中

10. oberrant
  adj.超乎党轨的；变态的；异常的（漂离）ab(=away)
  oberrance n.越轨；逸出
  aberration n.越轨；恍惚；错乱

11. inerrant
  adj. 无错误的 in(=not)
  inerrantic adj.非反复无常的；有规律的；固定的

12. aberration [脱离某物徘徊ab(=from)+err(=wander)]
  n. the state of being abnormal; an abnormal act; failure of rays to focus 脱离常规；越轨；像差（焦点不准确而造成的物象模糊）
  aberrant adj.脱离常规的；越轨的；
  An aberration in the lens caused the telescope to reveal a flawed image. 镜头出现了像差，导致望远镜上的图像有些走样。

词根：err 漫游, 走, 行

errant [err漫游，-ant形容词后缀，…的] 周游的，飘泊的

errantry [见上，-ry名词后缀] 游侠行为;游侠

erratic [err漫游，-atic形容词后缀，…的] 飘忽不定的

error [err漫游，走→走离正道→走错，-or抽象名词后缀] 错误，谬误

erring [见上，-ing…的] 做错了事的，走入歧途的

aberrant [ab-离开，err走，-ant…的] 离开正路的，脱离常轨的

aberrance [ab-离开，err走，-ance名词后缀] 离开正道，脱离常轨

aberration [见上，-ation名词后缀] 离开正道，脱离常轨

inerrable [in-不，err走，走离正道→错误，-able可…的] 不会错的，绝对正确的

inerrancy [in-不，err走离正道→错误，-ancy名词后缀] 无错误，绝对正确

词根词缀：-ac

【来源及含义】Greek > Latin: suffix; from French -aque, or directly from Latin -acus, from Greek -akos forming adjectives. This suffix was used to form names of arts and sciences in Greek and it is now generally used to form new names of sciences in English; meanings, "related to, of the nature of, pertaining to, referring to"

【相关描述】The suffix -ic has related elements.

【同源单词】ambrosiac, ammoniac, amnesiac, anaphrodisiac, anthomaniac, antidemoniac

词根词缀：allo-, all-

【来源及含义】Greek: different, other, another; divergence; a combining form denoting a condition differing from the normal or a reversal, or referring to "another"

【相关词根词缀】 Inter-related cross references, directly or indirectly, involving word units meaning "another, other, different, alternating, varied, changing": ali-; alter-; allelo-; hetero-; mut-; poikilo-; reciproc-; vari-.

【同源单词】allegory, allenthesis, allergen, allergization, allergy, allesthesia

词根词缀：aquil-

【来源及含义】Latin: eagle; referring to or like an eagle

【同源单词】accipitrine, Aquila, aquiline, Aquilo, eagle, eagle

词根词缀：bi-, bin-, bino-, bis-

【来源及含义】Latin: two, twice, double, twofold; a number; it normally functions as a prefix

【相关描述】This bi- is used before s, c, or a vowel. Don't confuse this bi- with another one which means "life".

All words except biennial referring to periods of time and prefixed by bi- are potentially ambiguous. Since bi- can be taken to mean either "twice each" or "every two", a word like "biweekly" can be understood as "twice each week" or "every two weeks".

【同源单词】biacid, biangular, biannual, biannual, biarchy, biarticulate

词根词缀：didym-

【来源及含义】Greek: twin; testicle

【相关描述】Words that include the Greek element didym- which oddly provides us with words referring to "twins" or "testes".

【同源单词】cryptodidymus, didymalgia, didymitis, didymus, epididymis, epididymitis

词根词缀：herm-, herme-

【来源及含义】Greek: Hermes, the son of Zeus and Maia, the god of commerce and messenger of the gods in Greek mythology; identified by the Romans as Mercury; however, some of the words in this unit come from Hermes tris megistos, Hermes Trismegistus, literally, "Hermes, Thrice the Greatest" referring to the Egyptian god Thoth, who was identified with the Greek god Hermes, of science and arts

【同源单词】herm, Hermanubis, hermaphrodite, hermaphroditic, hermeneutic, hermeneutical

词根词缀：hysteres-, hystere-

【来源及含义】Greek: shortcoming, deficiency; to be behind, to come late, to lag; later

【相关描述】This hesteres unit of words is not related to a similarly spelled hystero- unit of words referring to the "womb" or "uterus"; and hysteria.

【同源单词】hysteresis, hysteresis clutch, hysteresis coefficient, hysteresis coupling, hysteresis cycle, hysteresis error

词根词缀：hystero-, hyster-, hysteri-

【来源及含义】Greek: the womb or uterus; hysteria

【相关描述】"Hysteric disturbances", that most frequently occur in women were ascribed erroneously by ancient Greeks to the influence of the womb and were, for this reason, called hysteria, "disease of the womb".

This hestero- unit is not related to a similarly spelled hysteres- unit of words referring to "shortcoming, deficiency; to be behind, to come late, to lag; later".

【同源单词】colpohysteropexy, colpohysterotomy, electrohysterogram, electrohysterography, epidemic hysteria, hesteriac