后缀：-fold [形容词及副词后缀]

表示...倍、...重

twofold 两倍，两重

threefole 三倍，三重

fourfold 四倍，四重

sevenfold 七倍，七重

tenfold 十倍，十重

hundredfold 百倍，百重

thousandfold 千倍，千重

manyfold 许多倍地

词根词缀：bi-, bin-, bino-, bis-

【来源及含义】Latin: two, twice, double, twofold; a number; it normally functions as a prefix

【相关描述】This bi- is used before s, c, or a vowel. Don't confuse this bi- with another one which means "life".

All words except biennial referring to periods of time and prefixed by bi- are potentially ambiguous. Since bi- can be taken to mean either "twice each" or "every two", a word like "biweekly" can be understood as "twice each week" or "every two weeks".

【同源单词】biacid, biangular, biannual, biannual, biarchy, biarticulate