Sentence Explanation

The sentence describes a person who completely gives up or turns away from their previously held religious beliefs or fundamental principles. We need to find a single word that accurately captures this meaning.

Options Analysis

Let's look at the meaning of each option provided:

• Apostate: This word refers to someone who formally renounces or abandons their religious faith, political affiliation, or a cherished principle. It strongly matches the definition required.
• Heretic: A heretic is someone who holds beliefs or opinions that are different from or contradict the official beliefs of a religion or group. They often challenge doctrines from within, rather than abandoning the faith entirely.
• Infidel: This term historically referred to someone who did not believe in a particular religion, especially Christianity or Islam. It often implies a rejection of a specific faith, sometimes from an opposing religious viewpoint.
• Pagan: Generally, a pagan is someone who follows a religion other than one of the main Abrahamic religions (Christianity, Islam, Judaism). It often refers to polytheistic or nature-based beliefs.

Correct Substitution Identification

Comparing the definitions:

• The definition of Apostate directly matches the description "One who abandons one's religious faith or principles". It emphasizes the act of renunciation or abandonment.
• A Heretic deviates in belief but doesn't necessarily abandon the faith itself.
• An Infidel is typically defined by their non-adherence to a specific dominant religion, rather than the act of abandoning a faith they once held.
• A Pagan refers to a type of religious following, not necessarily the abandonment of a previously held faith.

Therefore, Apostate is the most fitting word to substitute the given sentence.