ninefold

American  

[nahyn-fohld, nahyn-fohld] / ˈnaɪnˌfoʊld, ˈnaɪnˈfoʊld /

adjective

1. nine times as great or as much.

2. having nine elements or parts.

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adverb

1. in a ninefold manner or measure; to or by nine times as much.

   to increase one's income ninefold.

ninefold British  

/ ˈnaɪnˌfəʊld /

adjective

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

2. composed of nine parts

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adverb

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

Etymology

Origin of ninefold

before 1000; nine + -fold; compare Old English nigonfeald in same sense (not attested in ME)

Example Sentences

Levels of the therapeutic protein increased nearly ninefold, while indicators of liver damage and inflammation dropped to near-normal levels.

From Science Daily • Apr. 20, 2026

Searches for mahjong lessons were up more than ninefold.

From The Wall Street Journal • Apr. 17, 2026

The figures are partly explained by surging numbers of Vietnamese -- up ninefold from a decade ago -- who now make up a quarter of Japan's 2.3-million-strong foreign workforce and are the biggest contingent.

From Barron's • Jan. 7, 2026

Growing global demand for the oil- and protein-rich seeds has fueled a ninefold increase in soy production in Brazil since 1985.

From Science Magazine • Nov. 26, 2024

Round them, with black slime choked and hideous weed, Cocytus winds; there lies the unlovely swamp Of dull dead water, and, to pen them fast, Styx with her ninefold barrier poured between.

From The Georgics by Virgil