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：tri-, tre-
【来源及含义】Greek > Latin: a numerical prefix meaning, three, thrice, threefold; triple; a word element for number 3
【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "three, third": terce-; terti-; trigono-; trito-.