fourfold
Word family adjectivefourfoldfourscorefourscorthfour-squarenounfourfoldnessfoursomefourballfour-by-fourfour-leaf cloverfour-letter wordfourpencefourpennyfour-wheel drivefour
four·fold /ˈfɔːfəʊld $ ˈfɔːrfoʊld/ adjectiveadj , adverb four times as much or as many 四倍的[地] a fourfold increase in price 价格的四倍上涨
Profits rose fourfold. 利润上升到原来的四倍。