Take money from (someone) by cheating, defrauding, or overcharging them
To take money from someone by cheating or tricking them.
VERB
Bilk - To take money from someone by cheating or tricking them.
The con men in the big city are always looking for naive out-of-towners in order to bilk them of the money they took with them for their big trip to the big town.
The intention to do secret actions that are meant to do harm
Very stupid or silly
Behaviour that is untruthful, deceptive or born of ill intent.
Proceeding in a gradual, subtle way, but with harmful effects
ADJECTIVE
Sinister - The intention to do secret actions that are meant to do harm
The prince always treated the king with great respect, but he was using the queen in a sinister plot to have the king killed so that he could take over.