词根：ne(na, no, n) = not 不

  来源于古英语或拉丁语ne，亦作 n- ( 它在元音前的变体 ) 意为not,表示否定。其变形有na, no,n等。

同源词：

1. annul [使接近没有an<ad(=to, near)+n<ne(=not)+ul(=any)]
  vt. 宣布…无效；废止，取消
  annulment  n. 取消，废止
  Failure to arrive to work on time will annul your employment contract. 如果你不能准时上班，将被解除聘用合同。

2. nefarious
  adj. 恶毒的，邪恶的 *fa(=say)

3. nescience
  n. 无知 *sci(=know)
  nescient  adj. 无知的

4. neuter
  adj. 中性的；（植物）无性的；生殖器发育不全的；不生育的
  n.[语]中性名词；中性；生殖器发育不全的动物；阉割过的动物
  v. 阉割
  *uter(=whether of the two)
  neutered tomcat  阉割过的雄猫

5. neutral
  adj.中立的；中立国的；中性的；模糊的；略带灰色的；（齿轮）空档的
  n. 中立者；中立国；（齿轮）空档  *utr<uter(=whether of the two)
  neutral nations  中立国
  neutral tints  暗淡色;灰色

6. neutrality
  n. 中立状态 *utr<uter(=whether of the two)
  armed neutrality  武装中立
  strict neutrality  严榕的中立

7. neutralize
  v. 使中立；使无效；使中和 *utr<uter(=whether of the two)
  neutralize a poison  中和毒素

8. neutron
  n. 中子

9. naught/nought
  n. 零；无 *ught(=thing),na,no<ne(=not)
  come to nought / naught 归于失败
  point nought / naught one 零点零一(0.01)

词根：mat = ripe

  来自拉丁语的mat 意为ripe。


同源词：

1. premature（在成熟之前的pre(=before) + mat(=ripe)）
  adj.（做法等）不成熟的；太早的，不到期的；早产的
  It would be premature to fire her;she's still learning her job.解雇她时机尚早，她还在熟悉工作。

2. immature
  adj.未成熟的，发育未全的 *im<in(=not)
  immaturity n.未成熟（状态）；未成年
  immature girl尚年幼的少女
  immature minds of young children 儿童未成熟的心智

3. mature
  adj.成熟的；酿熟的；慎重的；周到的：（票据）到支付日期的 v.使成熟；使长成；（票据）到期；酿成
  mature woman 成熟的女人
  mature plans 慎重的计划
  This wine has not matured properly.葡萄酒还没有酿好。

4. maturity
  n.成熟；（票据的）到期
  come to /reach maturity 成熟

5. maturate
  v.成熟；化脓
  maturation n.成熟；化脓

词根词缀：congru-

【来源及含义】Latin: to agree, to come together, to correspond with; "suitable, proper," from Latin congruentem, congruens, "agreeing, fit, suitable" from congruere, literally, "to come together, to agree, to meet", from com-, "with, together" + gruere, ruere, "to fall, to rush"

【同源单词】congruence, congruency, congruent, congruently, congruism, congruist

词根词缀：greg-, -gregate, -gregation

【来源及含义】Latin: flock; assemble; gather; come together, get together

【相关词根词缀】 Related "together" units: com-; inter-; struct-.

【同源单词】aggregate, aggregate, aggregate, aggregation, congregant, congregate

词根词缀：-itis

【来源及含义】Greek: a suffix; inflammation, burning sensation; by extension, disease associated with inflammation

【相关描述】This suffix has come to mean "inflammation of" but originally it meant "pertaining to" or "of the". The Greek word nosos ["disease"] was either expressed or understood, although it might not be included with the basic element. For example, bursitis nosos would mean "disease of the bursa".

【同源单词】actilnoneuritis, adenitis, adrenalitis, allergyrhinitis, angioitis, angiopancreatitis

词根词缀：juxta-, juxt-

【来源及含义】Latin: beside; close by, close to, near; adjoining; proximity; to come together, to meet

【同源单词】jostle, jostle, joust, joust, joust, juxt

词根词缀：not-, nosc-, nit-

【来源及含义】Latin: from gnoscere, to come to know, to get to know, to get acquainted [with]; know, learn; mark, sign; and cognoscere, to get to know, to recognize

【同源单词】annotate, annotation, cognition, cognitional, cognitive, cognoscente

词根词缀：-ology, -logy, -ologist, -logist

【来源及含义】Greek: a suffix meaning: to talk, to speak; a branch of knowledge; any science or academic field that ends in -ology which is a variant of -logy; a person who speaks in a certain manner; someone who deals with certain topics or subjects

【相关描述】The word -ology is a back-formation from the names of certain disciplines. The -logy element basically means "the study of ____". Such words are formed from Greek or Latin roots with the terminal -logy derived from the Greek suffix -λογια (-logia), speaking, from λεγειν (legein), "to speak".

The suffix -ology is considered to be misleading sometimes as when the "o" is actually part of the word stem that receives the -logy ending; such as, bio + logy.

Through the years -ology and -logy have come to mean, "study of" or "science of" and either of these suffixes often utilize the form of -ologist, "one who (whatever the preceding element refers to)".

The examples shown in this unit represent just a small fraction of the many words that exist in various dictionaries.

【相关词根词缀】Cross references of word families related directly, or indirectly, to: "talk, speak, speech; words, language; tongue, etc.": cit-; clam-; dic-; fa-; -farious; glosso-; glotto-; lalo-; linguo-; locu-; logo-; loqu-; mythico-; ora-; -phasia; -phemia; phon-; phras-; Quotes: Language,Part 1; Quotes: Language, Part 2; Quotes: Language, Part 3; serm-; tongue; voc-.

【同源单词】abiology, abiophysiology, academic anthropologist, academic anthropology, acanthologist, acanthology

词根词缀：pheno-, phaeno-, phen-, phenomeno-, -phen

【来源及含义】Greek: to show, to appear, or to display; making evident; literally, "to come to light" or "to bring to light"

【相关描述】Don't confuse the words in this unit with those in the phengo-, pheng- unit.

【相关词根词缀】 Etymologically related "light, shine, glow" word families: ethero-; fulg-; luco-; lumen-, lum-; luna, luni-; lustr-; phengo-; phospho-; photo-; scinti-, scintill-; splendo-. Etymologically related "look, see, view, visible, vision" word families: blep-; -orama; scopo-; spec-; vid-, visuo-. Cross references of word families that are related directly, or indirectly, to: "appear, visible, visual, manifest, show, see, reveal, look": blep-; delo-; demonstra-; opt-; -orama; pare-; phanero-; phant-; scopo-; spec-; vela-, veal-; video-, visuo-.

【同源单词】allophenic, apophenia, heterophenomenology, isophene, isophenomenal, isophenous

词根词缀：prosely-

【来源及含义】Greek > Latin: convert; stranger, one who has come over; to come to; to surrender; to associate with

【同源单词】proselyte, proselytism, proselytization, proselytize, proselytizer