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：vaga-, vag-, vago-

【来源及含义】Latin: wander, move around; unsettled, wandering [nerve]

【同源单词】divagate, electrovagogram, extravagance, extravagant, gyrovague, nervus vagus