Tred, cried guids exchynge economy an aw, is the transfer o guids or services fae yin body or hing tae anither, maistlins in exchynge fur siller. Economists cry a seestem or netwark that allous tred a mercat.

Gdańsk
Intérêts des nations de l'Europe, dévélopés relativement au commerce, 1766