Origin and history of monetary

mid-13c., monie, "funds, means, anything convertible into money;" c. 1300, "coinage, coin, metal currency," from Old French monoie "money, coin, currency; change" (Modern French monnaie), from Latin moneta "place for coining money, mint; coined money, money, coinage."

This is from Moneta, a title or surname of the Roman goddess Juno, near whose temple on the Capitoline Hill money was coined (and in which perhaps the precious metal was stored). The name is said to be from monere "advise, warn, admonish" (on the model of stative verbs in -ere; see monitor (n.)), by tradition with an etymological meaning "admonishing goddess," which is sensible, but the etymology is difficult. A doublet of mint (n.2)).

Extended by early 19c. to include paper recognized and accepted as a substitute for coin. The highwayman's threat your money or your life is attested by 1774. Phrase in the money (1902) originally referred to "one who finishes among the prize-winners" (in a horse race, etc.). The challenge to put (one's) money where (one's) mouth is is recorded by 1942 in African-American vernacular.

Money-grub for "avaricious person, one who is sordidly intent on amassing money" is from 1768; money-grubber is by 1835. The image of money burning a hole in someone's pocket is attested from 1520s (brennyd out the botom of hys purs).

I am not interested in money but in the things of which money is the symbol. [Henry Ford]

1914, "of a monetary character or having a monetary basis," from monetary + -ist. As a noun, "one who advocates tight control of the money supply to remedy inflation," by 1963. Related Monetarism (1963).