词根：-ann-

【词根含义】：年

【词根来源】：来源于拉丁语名词ann.us, ann.i, m(年)。

【同源单词】：annals, anniversary, annual, annuity, biannual

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：-enni-, -ennial, -ennium

【来源及含义】Latin: year, years

【同源单词】aere perennius, amillennialism, annual, biannual, bicentennial, biennia