The underlined word is "duplicity." The task is to identify the option closest in meaning to "duplicity."
First, define "duplicity." Duplicity means deceitfulness or double-dealing in actions or words, implying a lack of sincerity or hidden intentions.
Next, analyze the provided options:
deceit: This term signifies the act of misleading or tricking someone, closely matching the meaning of "duplicity" as both involve deception.
usefulness: This refers to being of service or advantageous. It has no connection to deceit and is not a synonym for "duplicity."
emotion: This denotes a strong feeling. While emotions can sometimes lead to deceit, "emotion" itself is not synonymous with "duplicity."
wisdom: This involves knowledge, experience, and sound judgment. It is unrelated to deceit and therefore not connected to "duplicity."
Considering the definitions, "deceit" is the closest synonym to "duplicity."
The correct answer is: deceit.