What term describes a person who engages in fraudulent behavior?

The term that best describes a person who engages in fraudulent behavior is "quack." A quack typically refers to someone who pretends to have medical or other expert skills and expertise, often misleading others for personal gain, typically through deceitful practices. This term is commonly associated with individuals who make false claims about their professional abilities, especially in health or wellness industries.

In this context, a quack exemplifies fraudulent behavior by making unsubstantiated claims to convince others of their supposed qualifications, thereby exploiting their trust for profit or benefit. Understanding the nuance of this term is crucial because it highlights the deceitful nature of their actions, which can have serious consequences for those who fall victim to their scams.

The other terms present different meanings that do not align with fraudulent behavior, emphasizing the importance of choosing the right vocabulary to convey specific kinds of deceitful conduct.