词根词缀：ann-, anni-, annu-

【来源及含义】Latin: year, yearly

【同源单词】annalist, annals, anniversary, anno Domini, anno mundi, annual

词根词缀：per-

【来源及含义】Latin: through, across, over; beyond, by means of

【同源单词】Ad astra per aspera, Ad augusta per angust, Ad perpetuam rei memoriam, Ad virtutem per sapientiam, ampersand, antiperspirant