Scheme - A large-scale systematic plan or arrangement for attaining some particular object or putting a particular idea into effect, often through deceptive means
It's better to be honest and work hard, and not spend too much time devising or falling for schemes that are tempting shortcuts to making money.
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Scheme - Make plans, especially in a devious way or with intent to do something illegal or wrong
The family butler was always polite, but in his mind he was always scheming how to steal the family's jewels.