词根：-stru-, -struct-

【词根含义】：建设,结构

【词根来源】：来源于拉丁语动词struo, struere, struxi, structus(建设,结构)。

【同源单词】：destroy, instrument, instrumental, construct, construction

前缀：il-, in-, ir-, im-

【词根含义】：不,无,非;入,向内

【词根来源】：(il-用于l前;im-用于b, m, p前;ir-用于r前;in-用于其它情况)   来源于拉丁语in。

【同源单词】：illegal, illegality, illegitimate, illiterate, illogical

词根词缀：stru-, struct-, -structure, -struction, -structive

【来源及含义】Latin: to build, to build up; to pile; to construct; to place together, to arrange

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

【同源单词】agroindustrial, agroindustrialist, agroindustrialize, agroindustry, atmospheric structure, beta structure

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