Etymology

Inflation

The word meant swelling long before it meant prices rising. The body came first, the economy second.

Latin · 14th century

Latin

inflare (to blow into)

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Late Latin

inflatio (swelling)

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English

inflation

Inflation comes from the Latin inflare, meaning to blow into, from in- (into) and flare (to blow). The earliest English uses, dating to the fourteenth century, described physical swelling, the kind a physician would observe in an injured limb.1 For four centuries, the word belonged to the body, not the marketplace.

The monetary sense emerged in North America in the 1830s, during debates over paper currency and credit expansion. By the time of the American Civil War, when the Union printed greenbacks to finance the conflict, inflation had acquired its modern economic meaning: a general rise in prices resulting from an expansion of the money supply.2

1830s

The decade when inflation shifted from a medical term to an economic one in American English.

The metaphor embedded in the word is telling. To inflate something is to fill it with air, to make it appear larger than its substance warrants. When the word migrated from medicine to economics, it carried that implication with it. Rising prices were not growth. They were swelling, an unhealthy expansion that created the appearance of value without the reality.3

German speakers use the same Latin root. The hyperinflation of the Weimar Republic in 1923, when prices doubled every few days, gave the word an existential weight it had never carried before.4 In November 1923, a loaf of bread cost 200 billion marks. The word that once described a swollen ankle now described the collapse of a currency and the savings of an entire generation.

Timeline

14th century

Inflation entered English as a medical term meaning physical swelling.

1830s

The word acquired its monetary meaning in North America during debates over paper currency.

1860s

Union greenbacks during the American Civil War cemented the economic usage.

1923

German hyperinflation gave the word existential weight, with bread reaching 200 billion marks.

Endnotes

1 Oxford English Dictionary, s.v. "inflation." Earliest English usage in the physical sense dates to the fourteenth century.

2 Douglas Harper, "inflation," Online Etymology Dictionary. The monetary sense appeared in the 1830s in North America.

3 Harper, Online Etymology Dictionary.

4 Adam Fergusson, When Money Dies: The Nightmare of Deficit Spending, Devaluation, and Hyperinflation in Weimar Germany (London: William Kimber, 1975).