intended to deceive
"deceitful advertising"
"fallacious testimony"
"smooth, shining, and deceitful as thin ice"
"a fraudulent scheme to escape paying taxes"
Dishonest; based on fraud or deception.
"The fraudulent claims made by the salesman were later exposed as a deliberate scheme to deceive customers."
In plain English: Fraudulent means something is done dishonestly to trick people and steal from them.
"The fraudulent claims made by the salesman caused many people to lose their money."
The word entered English via the Middle English and Old French forms of fraudulent, which ultimately derive from the Latin adjective meaning "deceptive." Its root is the Latin noun fraus, which directly signifies fraud.