通貨

currency / (old) exchange of goods

to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc

classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)

goods / money / commodity / CL:個|个[ge4]

inflation

hyperinflation

deflation