Concept: An antonym is a word opposite in meaning to another. The underlined word is "fraud."
Step 1: Understand the meaning of "fraud"
A "fraud" (as a noun referring to a person) is someone who deceives others, typically for personal gain; an impostor, a charlatan, or a cheat. It implies a lack of genuineness or authenticity.
As a concept, fraud refers to wrongful or criminal deception intended to result in financial or personal gain.
Step 2: Analyze the meaning of the options
(1) Trickster: A person who cheats or deceives people. This is a {synonym} for fraud.
(2) Burglar: A person who illegally enters a building and steals things. While a type of criminal, it's specific to theft by breaking and entering, not directly opposite to "fraud" in the sense of deception about one's identity or nature.
(3) Conman (Confidence man): A man who cheats or tricks someone by gaining their trust and persuading them to believe something that is not true. This is a {synonym} for fraud.
(4) Authentic (adjective): Of undisputed origin and not a copy; genuine. If used to describe a person, it means they are true to their own personality, values, or spirit; not false or an imitation. This is opposite to being an impostor or a fraud. The noun form would be "authenticity."
Step 3: Identify the best antonym
The word "fraud" implies deception and a lack of genuineness.
The word "authentic" means genuine, real, not false or copied.
Therefore, if a person is a "fraud" (impostor, not genuine), the opposite would be someone "authentic" (genuine, real).
While "authentic" is an adjective and "fraud" (referring to a person) is a noun, in the context of describing a person's nature, "authentic" serves as the conceptual opposite.