lucre
n.
5ME < L lucrum, gain, riches < IE base *lau3, to capture > Sans l+otram, booty, OE lean, OHG lon, reward6 riches; money: now chiefly in a humorously derogatory sense, as in filthy lucre (cf. 1 Tim. 3:3)

Heard ;mostly as root of "lucrative" = financially rewarding