词根词缀：extra-, extro-, extr-, exter-

【来源及含义】Latin: beyond, outside, on the outside, outward, external

【同源单词】Ab extra, ad extra, ad extremum, exteriorly, external, external reforming

词根词缀：ord-, ordinato-, -ordin-, -ordinate, -ordinating, -ordinated

【来源及含义】Latin: order, in order; in a row, regular series, class, rank

【同源单词】coordinate, coordinate, coordinately, coordinateness, coordination, coordinative