What does fiftyfold mean?
Fiftyfold means fifty times as much, as many, or as large, and it is used both as an adjective and, less commonly, as an adverb. It belongs to a productive family of English multiplicative compounds formed with the suffix '-fold' — such as twofold, tenfold, and hundredfold — which trace back to Old English. The word typically describes dramatic growth or multiplication, appearing most often in discussions of finance, economics, science, and scripture: one might speak of a fiftyfold increase in revenue, a fiftyfold expansion of capacity, or crops yielding fiftyfold. Its connotation is emphatic rather than casual; because it names a precise factor, it lends quantitative weight to a claim while sounding more literary than a plain '50 times'. Writers choose it when they want scale expressed with economy and a touch of formality, making it especially at home in reports, journalism, and elevated prose.
Fifty times as great, numerous, or extensive.
"The village saw a fiftyfold growth in population during the gold rush."
Often used attributively before nouns like 'increase', 'growth', or 'rise'.
By a factor of fifty; to fifty times the original amount.
"Output increased fiftyfold over the course of the war."
Typically follows verbs of increase such as grow, rise, multiply, or expand.
In the Parable of the Sower, some seed 'brought forth fruit a hundredfold' — fiftyfold belongs to that ancient biblical family of multiplying words still used today to describe explosive growth.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fiftyfold
Fiftyfold derives from Old English, combining 'fīftig' (fifty) with the suffix '-feald', meaning 'folded times' or 'multiplied by'. The '-fold' suffix is ancient, related to similar multiplicative forms in other Germanic languages, and appears in biblical translations describing abundant yields. Cognates include twofold, tenfold, and hundredfold, all built on the same Germanic pattern.
How fiftyfold is actually used
Fiftyfold is somewhat formal and appears most often in financial, scientific, and biblical contexts. It functions adjectivally ('a fiftyfold increase') and can be used adverbially after verbs of change ('to rise fiftyfold'). It is written as one word, without a hyphen.
Easily confused with fiftyfold
Fifteenfold means multiplied by fifteen, whereas fiftyfold means multiplied by fifty; the words differ only slightly in sound but greatly in magnitude.