fourfold

American  

[fawr-fohld, fohr-] / ˈfɔrˌfoʊld, ˈfoʊr- /

adjective

1. comprising four parts or members.

2. four times as great or as much.

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adverb

1. in fourfold measure.

fourfold British  

/ ˈfɔːˌfəʊld /

adjective

1. equal to or having four times as many or as much

2. composed of four parts

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adverb

1. by or up to four times as many or as much

Etymology

Origin of fourfold

before 1000; Middle English foure fald, Old English feowerfealdum. See four, -fold

Example Sentences

The combined exposure was linked to more than a fourfold increase in risk.

From Science Daily

One study this year found young users had a sixfold higher risk of heart attacks and fourfold greater of strokes.

From The Wall Street Journal

It is estimated they consume about 2.5% of the UK's electricity, and as more are built, their power demand could rise fourfold by 2030.

From BBC

It said the pledge "aims to provide political support and promote international cooperation to increase at least fourfold the use of sustainable fuels by 2035, through the implementation of existing or announced policies."

From Barron's

Along with the U.S. fiscal deterioration, the firm noted that it’s hardly a coincidence that gold has increased fourfold since 2008-09, when the Federal Reserve under Ben Bernanke instituted quantitative easing.

From Barron's