noun
lucre
LOO-ker/ˈluːkər/
Money or profit regarded as dishonestly or shamefully gained.
The crooked officials care more about lucre than public service.

Etymology
Lucrum meant material gain or wealth without necessarily condemning it. English lucre became especially associated with unworthy gain and wealth pursued greedily, giving the word its dishonorable coloring.
In context
very good woman, but she had aspirations in the direction of filthy lucre on behalf of her children
More examples
- She refuses to trade her principles for filthy lucre.
- The scheme funnels lucre into the owner's private account.
- He accuses the company of chasing lucre at patients' expense.
Forms
lucrative adjective — Producing a large amount of profit.