adjective
monetary
MAH-nih-tair-ee/ˈmɑːnɪteri/
Relating to money or currency.
Banknotes and coins have monetary value because people accept them as payment.

Etymology
Moneta meant both a mint and the coinage it produced. The adjective originally concerned a mint, then currency, and broadened to money in general.
In context
european monetary union is at a crossroads in the book you can see some what is needed to have a optimum currency area
More examples
- The central bank adjusts monetary policy to help control inflation.
- The winner receives a monetary prize.
- The necklace has sentimental value but little monetary worth.
Forms
monetary
money noun — Coins, bills, or funds used for payment.