词根：-gn-, -not-, -gnor-, -gnos-

【词根含义】：知道

【词根来源】：-gnos-来源于拉丁语动词gnosc.o, gnosc.ere, gnovi, gnotus(知道)的词干-gnosc-; -not-来源于拉丁语动词nosco, noscere, novi, not.us(知道)的过去分词词干-not-; -gnor-来源于含有否定前缀i-的拉丁语动词i.gnor.o, i.gnor.are, ignoravi, ignoratus(不知道)的词干-gnor-。这些拉丁语的词源可追溯至原始印欧语-gn-。

【同源单词】：cognition, cognitive, cognize, recognise, recognition

前缀：co-

【词根含义】：共同,一起;加强意义

【词根来源】：com-的变体,来源于希腊语koinos(共同)。

【同源单词】：coagent, coexistence, cognition, cognitive, cognize

词根词缀：cogni-, cogn-, cognosc-

【来源及含义】Latin: know, learn

【相关词根词缀】 Inter-related cross references, directly or indirectly, involving word units meaning "know, knowledge; learn, learning": discip-; gno-; histor-; intellect-; learn, know; math-; sap-; sci-; sopho-.

【同源单词】archaeological reconnaissance, cognition, cognitional, cognitive, cognizable, cognizably

词根词缀：com-, co-, cog-, col-, con-, cor-

【来源及含义】Latin: together, together with, with

【相关描述】The prefix com- is assimilated to co- before h, w, and all vowels:

The prefix com- becomes, cog- before g: cognition, [co + gnoscere, "to know"], et al.

The prefix com- becomes, col- before l: colloquial, et al.

The prefix com- becomes, con- before c, d, g, j, n, q, s, t, v: covivant, et al.

The prefix com- becomes, cor- before r: corrigible, et al.

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

【同源单词】abscond, abscondee, anticorrosive, bioconcentration, coadjutant, coadjuting

词根词缀：gno-, gnos-, gnoto-, -gnostic, -gnosia, -gnomic, -gnomonic, -gnomical, -gnomy, -gnosia, -gnostic, -gnosis

【来源及含义】Greek: know, learn, discern

【相关词根词缀】 Inter-related cross references, directly or indirectly, involving word units meaning "know, knowledge; learn, learning": cogni-; discip-; histor-; intellect-; learn, know; math-; sap-; sci-; sopho-.

【同源单词】abarognosis, acognosia, ad ignorantiam, agnogenic, agnoiology, agnosia

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：-tion

【来源及含义】Latin: a suffix forming nouns from verbs of condition and action; an act or process: resumption, absorption; state or condition, redemption, exhaustion; something resulting from or otherwise related to an act or process, assumption, friction

【相关描述】This unit is presenting a small fraction of the hundreds of words ending with the suffix of -tion; however, there is a significant number of words which may help everyone have a better understanding and appreciation of the use of this element.

【同源单词】abduction, abjection, ablution, ablution, abolition, abruption