 The plural form of Denga, den'gi (деньги) has become the usual Russian word for 'money'.Silver dengas were not minted during the last years of Feodor I's rule, nor during the Time of Troubles, though silver wire kopecks were minted throughout this period, including emissions by imposters and invaders.During the time of Peter the Great, dengas transitioned from silver to copper, and from undated to Byzantine dates in Cyrillic to Julian dates in Cyrillic.